Never heard anyone mention the stick position = stall theory before.
I have often said to a student:
"Look how far back the control column is...!"
or.....
"Come on, pull ya big jessy.....pull... get that stick back....!"
etc... during a stalling lesson but have never said:
"Oi Bloggs, that's where ya stick's gonna be when ya stall".
Seems odd to me that does, but if it keeps ya punters out of oak panelled rooms then fair enough!
VFE.