FWIW, I used the slow way on my commercial ride like I said, and that's about how it went, I don't think I ever moved the yoke more than 1/2" in any axis throughout the whole manuver, my second instructor was big on the slow
part of it.
Can't say about the CFI; had 8's on for that, and managed to screw the pooch pretty badly both times
on that one, but I probibly would have done them the same way. Funny that you mention the Air Force thing though, I've had the fast meathod demonstrated to me by 2 instructors, one was like I said, an ex-Navy S-3 pilot, the other was a retired Marine A-6 B/N, must be a military thing....
If I rememeber, the key that helped me best on them was, that you should have constantly changing rates of pitch and roll. And I know I was using less than Va as an entry speed, I think I was using 100 mph and 19/2000, but that was in a straight legged 182.
I know I'm rambling now, but it's late and that's what happens with insomnia... anyway, your best bet (besides doing them the way you know the best) might be to just give you local FSDO a call and ask. Unless there's a severe backlog or you're doing your CFI part 141 you'll be going through them anyway. Ask the examiner yourself which way the FAA perfers to see on a CFI checkride. Can't hurt, right?