WWW,
You're missing my point. To continue with that example, if I'm happily putting carb heat back on short final with no problem, I don't an instructor deciding that I shouldn't be doing it. Or if he's convinced he's right for some reason, an explanation along the lines of: "We're ending up too high/low, I think you're getting overloaded, maybe if you didn't do that even if you've been taught to, try my way and see if it helps...." or something like that, might help. Telling me to do something your way just because you say so, may or may not be instructional technique, but it comes over to the student as arrogance.
Whirly