Im really late with this reply, I've been a bit lazy but here goes. From my own observations, in most systems its common for a student who is of the ranks 3rd kyu-1st kyu to be wearing a brown belt of some sort. Some schools might differentiate between the three kyu ranks with stripes on the belt some schools might not, every school has their own system but often a student who is of those ranks is wearing a brown belt. Anyway, the way I see it is that a student who is of the ranks 3rd kyu-1st kyu is being groomed for 1st dan and this is especially true for a student who is 1st kyu. I certainly would not be in favor of reducing the standards for 1st dan or Shodan as its called (1st degree black belt) to do so would be to water down the rank and water down the art which is if you ask me going in the direction of the so called McDojo. As for increasing the standards for the 3rd kyu-1st kyu ranks, especially 1st kyu that sounds like a good idea. Especially since, as I said earlier in this post, a student who is within those ranks is being groomed for 1st dan.
The letter grade analogy of A vs B might not be the best analogy. My point was that there is a ten point difference between an A and a B, a ten point difference between a B and a C and so forth. A better analogy might be history classes. Lets say a student in high school or college is taking history classes. In their first year or first semester they would take History I, than after that they would take History II then History III and finally History IV. History IV is not necessarily any harder than History III, II or I, its just sequential.
Anyway its late to say this but it would still be nice to get a response from JR 137. He often says some very intelligent, insightful, and useful stuff.
I'm not 100% sure what you're asking, but I think you're asking my opinion on if 3rd kyu-1st kyu testing should be harder so going from 1st kyu to 1st dan isn't a huge step in difficulty?
So long as the standard for 1st dan isn't compromised, sure. I think it's a great thing. I don't think you should make the shodan (1st dan) test easier in any way, but rather make the 3rd-1st kyu tests harder.
My personal experience...
1st stint in karate, I was scheduled to test for 2nd dan and preparing, but was offered a graduate assistantship 4 hours away...
Every kyu test was increasingly difficult. 10th - 4th or so weren't too hard. 3rd was a big jump, 2nd was a decent jump from 3rd. 2nd - 1st kyu was a decent jump. Testing for 1st kyu was like a scaled down 1st dan test. About half the amount of time, and 2/3-ish the intensity.
1st kyu test was about 2-2.5 hours. We covered about 70% of the syllabus from 10th-2nd kyu (no new material at 1st). There's always curveballs when doing material during a test, but there weren't very many. It was pretty straightforward. My CI was very strict on technique during kata, basics, and prearranged stuff. We did 10-15 rounds of sparring.
Shodan was very tough. About 5 hours of actual physical testing time (we wrote and discussed a paper, and getting the belt took longer as he had a lot more to say and tell us than usual).
It was nonstop. The first thing we did was 100 front kicks, each leg, with a black belt holding a kicking shield. Then 100 each leg of most kicks - roundhouse, side, hook, inside-out and outside-in crescent, knee kick, groin kick, and probably a few more. After that he said "now that we're warmed up, we can begin." Begin?
Then we went through the entire syllabus, one kyu rank at a time, minus kata and prearranged stuff.
Then we got to kata. He had another black belt holding a clipboard and crossing out each kata after we finished it. He needed the clipboard because he'd call them out in random order, and we'd just keep going rather than stop and reset after each one. There were 14 kata total. We went through them all to his count, then through them all again without him counting.
The biggest curveball was our 1 step sparring. We had always gone through them in order, and from a stereotypical attacker in a forward leaning stance, right hand low block, then step and punch. We'd do them all against a right punch, then against a left punch. We have 10 "basic" 1 steps and 10 "intermediate." Against right punch and left punch, there's 40 total. This time, we were in a fighting stance and moving around like free-sparring, and he'd call out a random number and random punch, such as "basic #5, left punch coming, go!" Intermediate #2, right punch coming, go!" We did each one several times so we couldn't anticipate which ones were left/next.
Then we did 25 rounds of sparring. 2 minutes each, no break, knockdown rules (but with hand, feet and head protection), and a fresh black belt opponent every round. After that we did a 4 minute round against each other (there was only 2 of us testing).
Sorry if I went too far describing the shodan test. I was reliving some glory. I loved every second of that test. It was by far the most physically difficult thing I've ever done. The 1st kyu test was physically tough, but it was pretty straightforward. The shodan test was significantly harder physically and mentally. I spoke to my old teacher about it a few years ago. That was the first black belt test he ran on his own (he left his organization a few weeks prior), and he said it was by far the hardest he's ever run. There were only two of us testing, and his goal was to bring us as close to our breaking point as possible. We were both early 20s guys who'd been around since the bare knuckle days and were two of the 3 hardest workers in the dojo. He's lightened up a bit since then. He said he's shortened the test to about 2.5 hours, but the sparring requirement hasn't changed any.
I'm 3rd kyu at my current dojo. My last test was right around the 4th of July holiday. It was only 1.5 hours, but it was easily the second hardest test I've been through, physically. I know about 90% of the material from my previous dojo (my former organization was started by 2 guys from my current organization, so the syllabi are about 90% identical), so my current CI can push me a lot harder physically instead of having me repeat stuff as much as others without my background.
How big a jump will 1st kyu to shodan be in my current school? No idea. But it shouldn't be a huge jump physically as my previous dojo. It's not an apples to apples comparison though - my previous school did shodan testing in one day. My current organization reportedly does it over 4 or 5 sessions, with each session being around 2 hours. If it was all in one day, as there have been occasionally for out of town people, it would basically be the same way my former sensei did it. Basically, my former sensei did what the head of my current organization does, only he did it in one day vs spread over 4 evenings. So if I'm currently used to physically intense 2 hour testing sessions, my shodan test won't be a big jump; it'll just be more of the sessions. But my teacher and his teacher (who'll test me for shodan, and is the head of my current organization) most likely have different curveballs to throw at me. Being two different people, that's just the nature of the beast though.
Sorry for the extra long post. Hopefully it doesn't take an hour to read through it all