I would have thought that the "correct" method is specified in some CAP or other - everything else is, it seems. Maybe a JAA publication. That ends the argument immediately.
I have always taught it both ways... "this the warning... recover... this is the buffet... recover... this is abusing the aircraft by holding it in the stall, look how benign it is... recover... this is a wing dropping... recover... oh look, we are in a spin now... recover..."
I once had a Japanese student, inherited from another instructor, who claimed to know spin recovery, but when handed the controls of a spinning Aerobat, didn't recover. I ended up taking the aircraft up to 6000 feet, putting it in a spin, and waiting for him to recover it. After six turns, I gave up and did it myself.
"Do you know a standard spin recovery?"
"Ah, yes"
"Hmmm... describe a standard spin recovery."
Silence.
A cultural problem...
BTW, thank you
BEagle for laying out your credentials. I shall henceforth genuflect whenever I see your username...
