I have been flying since the 70's and have held an instructors rating since the 80's (we don't use it for time building in Canada). I honestly have never seen this technique or even heard of it!!! How many here have ever seen any pilots actually do this? On some aircraft t/r thrust is so effective, abrupt pedal inputs can damage the airframe.
I have been flying cranes for 9 years, the pedals are extremely heavy and take much effort to move as there are built in restrictors...other than brake usage, feet are resting on the floor.

I would like too hear nuggets, what is your CFI's reason for this technique???

heels on the floor?

perhaps it depends a bit on the shoes - and size as already mentioned:
good feeling and free movement with sandals :8
mountain boots in size 11 give some range of movement with the heel as pivot point on the floor , but not really in size 7: minimum effective movement will come from the legs via knees..

ok ladies, lets try to fly with high heels then :roll eyes:

btw: aerobatic fixed wing and gliders do need some very accurate pedal control and I prefer to keep my feet off the floor whilst having a bit of fun and full pedal movement is or might be required.

my shoe size is 10.5, what ever that means ;)