I am also finding this. I have done 3 licence revalidation flights this week and not one of the students was confident about fully stalling the aircraft claiming that during training they always recovered at the stall warner.
I think this is symptamatic of the low hours Instructors doing FI courses to hour build. We teach from experiance and a couple of hundred hours in a lot of cases is not enough experiance to pass on. I have flown with a few of these FI's who won't push the envelope through fear of not being able to recover.