whatever the original intention of the extensions was...there are many, many views on what purpose they really serve. through the years talking to other kenpoists, they all seem to take a different stand on extensions. here are the two main views i get:
1. SYSTEM FILLER
some people view the extensions as a way to pacifiy students who are moving towards black and beyond as well. they look at them as requirements that were put in to make the cirriculum have a longer life, to make it seem to the students they were learning something new. while i don't agree with this view, i can see where they are coming from. these are the same people that complain about them being too long (a complaint that i often share) and too complex (another i share, to a certain degree).
2. ADVANCED TEACHING TOOL
others view the extensions as methods to convey new material such as principles, footwork, strikes, manipulations, flows, etc....without coming up with new techniques to have to learn. after all, EPAK is not a system that tries to give you one straight answer for every outcome, it lets you formulate that answer yourself. i see more merit in this view i would say, as i love some of the extensions...or at least pieces of them. and i think that's all you're really meant to take from them and any other techniqe....pieces. different things that work in different situations.
i believe the extensions are so long at times that most students will get caught up in learning the flow of them and how to apply the whole technique, and then start to wonder how this would ever work in a real situation, missing the whole point of them completely. the extensions are misunderstood at best...and it's not usually the fault of the student, though i wouldn't put all the blame on the instructor.
on the subject of WHEN to teach the extensions...ugh...that's a tough one i think because everyone is different. in a perfect world, the students will learn what they should be learning as they go through the cirriculum just as the instructor has them planned to do. we all know this doesn't always happen though. plus you must take into account all of the different cirriculums out there now. some of them teach the extensions very early on in the "young" brown belt stages...perhaps a bit too early for some students.
but yes i do think a student should be able to show a certain level of proficiency with a certain technique before they are taught the extension to it. on the matter of the brown belts not being able to flow the techniques right away...they are still brown belts after all, not such a big deal. pus they are basically learning something new. they may have been trying to do it too fast at first.
paddy-cake eh? that's the way many, many schools are taking kenpo these days. deny it all you want...the proof is out there whether you choose to see it or not. sometimes people won't believe it's that big of a problem because they are in a good area for kenpo where people really bang out techniques and try new things and really strive to learn the art well. up here in the northeast...i see a lot of crap.