When I took my instructor exam, more than a few decades ago, I demonstrated a chandelle as a max. performance manuver - i.e. rollling wings level just as the aircraft was beginning to burble pre-stall. This was the way several instructors had taught me, including Dad who had instructed in AT-6's. Stall warners were non-existent in many aircraft at that time.
But my examiner didn't like that one bit - he said the stall warner (C-172) should only be occasionally beeping as I rolled out. I said "Can I try it your way?" - and I did to his satisfaction. Maybe he was just looking at my ability to adapt to a different style manuver - in any case I passed the exam.
