C J Campbell opined

I think the instructor's reasoning is faulty. Why would the stall speed
increase as the airplane ages? If it has increased measurably, then
something needs to be repaired.

Bugs, dents, dirt would all change the shape of the wing. How much that would
change the stall speed is an open question. Perhaps the FAA could be useful
and do some research.

I don't even teach student pilots to fly faster than necessary. It is too
easy for a student to lose control on a fast approach, especially if he
balloons or bounces.





-ash
Cthulhu for President!
Why vote for a lesser evil?