I train Taekwon do for 10 months, six times a week, two hours training, most of the time intensive and hard training.
I earned black belt.
I asked my master is is ok, he sad it is, and if i missed something, i have almost two years until i can go for 2nd Dan, so in that time i will compensate it.
He sad i completely deserve my black belt.
Lets put it into perspective: Average time to BB in most commercial schools in the US is 18-24 months in TKD, with students going to a one hour class class 2 times a week on average. That comes out to 144 hours in 18 months and 208 hours for 24 months. Six two hour classes per week in ten months, averaging four weeks per month, comes out to 480 hours.
So if your only question is the amount of
time it took you from white to black, in terms of time actually spent in formal training, you ahve more than twice that of the average two year black belt.
As far as the quality of your training, knowledge of curriculum, depth of knowledge, sparring skill, and overall quality, that is something that your instructor knows better than any of us.
I am of the opinion that, even within the same organization, a blackbelt has little meaning outside of the school that issued it. If you go to another school, they will know fairly quickly what your quality is as soon as you step onto the mat and start performing, regardless of what belt you are wearing.
You take the class to learn what the teacher has to teach, not to get a belt. The belt serves only to mark where you are in the curriculum and that you are proficient in what you have learned before that point. That is all.
I do think that you should try to answer Earl's questions regarding federation and president, as that will not say anything about your master or school. You certainly don't have to, but Earl is very knowledgeable and can likely give you a very good perspective on your question. But organizations differ in time in grade averages, so it may be helpful to let him know.
Lastly, congrats! Remember that a blackbelt is a white belt who didn't quit. A second dan is a blackbelt who didn't quit. A third dan is... well, you get the picture.
Daniel