In article gers.com, David
Megginson writes:

Yes, that's been my experience in both the 172's I trained in and my
Warrior. It's probably because they're trainers: the manufacturers designed
the controls so that you just cannot pull the yoke back far enough for a
full stall, unless you enter from a steep turn or whip the yoke back very
quickly into an accelerated stall.


Peoblem (or solution) is not in pulling the yoke back far enough. The wing has
enough wash out (twist) that the inboard part stalls before the out board part
and you lose enough lift to start the mush down.

Chuck