I've participated in this thread, so I am not moderating it.
It's become an interesting test case of the "hands off and let the participants sort it out" approach to the DIR forum, which was one of the suggestions I got when I asked how the forum should be managed. I don't think it looks as though that works very well.
Anyway, to address the question of "instruction" in GUE courses: In my Fundies class, the instructor gave us a great deal of help with kicks, including patterning our feet through the kicks on land, and doing the same thing underwater. That's how I got the frog kick. He gave us feedback on buoyancy and trim, and some tips on better buoyancy control. He demonstrated bag shooting on land (as much as you can) and underwater, and critiqued the performance of those who got as far as trying that skill.
I don't think you can TEACH buoyancy control. I think you can describe it, and you can try to tell somebody what you've figured out about managing it -- Monitoring your breathing, or the way your drysuit feels, or watching the particulates in the water as a reference -- but a diver has to practice and build facility on his own. Buoyancy control is a HUGE part of both of the GUE classes I've taken, along with trim. Now, trim I think you can help somebody with a great deal, in terms of working with weight redistribution and body posture. I didn't get much help on my trim, except to be told that it was okay as long as I wasn't task-loaded, but fell apart when I was. The answer proved to be that I was weighted in such a way that I could compensate for it when I had enough bandwidth to do so, but when distracted, I went where my weights wanted me to go. Moving a few pounds up onto the cambands solved the problem, but I figured that out for myself.
My current frustration is awareness and good decision-making underwater, and I don't think you can teach that, either. At least, I've asked for ideas in a lot of places (not necessarily GUE places) and I've gotten a lot of advice to go diving, but very little in the way of specific ideas. So I don't fault my instructor for not "teaching" this. He provides us with opportunities to practice it, and feedback on how well we accomplish it, and I think that's about what's possible. Maybe I'm wrong.
There are really tons of Fundies reports on the web, on ScubaBoard and elsewhere. There are many discussions about preparation for Fundies. I know, because I think I read them all before I took the class. I knew that it was a bad idea to take the class in gear you weren't familiar with, so I borrowed the gear I used a month ahead of time. I knew that buoyancy control was key, so I worked very hard on it. I was thrilled to watch the video of my "Basic 5" and see that I stayed in place and almost at depth throughout. That was something I could work on on my own before the class, and I did. Having that much pretty close to dialled in made the rest of the class far more useful, although I didn't come close to passing.
Somebody who goes into the class in brand new gear, with marginal or poor buoyancy control, is not going to be able to spend much time learning kicks, practicing air-shares, or learning bag shoots. We had two very new divers (8 and 16 dives) in our Fundies class, and I'm sure they were about as frustrated as Caribbeandiver was. One of them went off and worked on his diving for over a year, and came back and retook the class. I believe he was very happy with it the second time.
DIR is not for everybody. Good buoyancy control, control of your trim, the ability not to silt out a dive site, good buddy skills, sharp emergency procedures, and excellent situational awareness ARE for everybody who dives. Fundies is a good place to get a toehold on those qualities, and I don't know where to send somebody who isn't interested in DIR diving and be sure they'll get them.