MikeFerrara once bubbled...
I will say this though. Telling students the whole story will eliminate much of the equipment being manufactured from concideration. That wouldn't be good for the manufacturers or the dive shops who need to sell the stuff and indirectly wouldn't do the agencies any good either since it's the shops and instructors who pay membership dues which is a significant percentage of the agencies income.
Mike,
What wouldn't be good for the manufacturers if the OW students knew, what "whole story" are you talking about?