To be totally honest here, I have been to a driving school with many hours of instruction and practice on heal and toe driving in Vettes The last day 8 twenty minute sessions all out on a road course in LS7 powered Z06's and was asked to come back for a huge Vette weekend as an instructor. I was falling back on my old methods and making great sounding but not real heal and toe downshifts.
I may be the from being blown out of a pump room by a swimming pool, 50 amps, 220VAC, and the right side of my body not always in sync with the left side.....but never got the hand of heal and toe.
A few years later I read an article about very successful racers then never used heal and toe, they did what I did minus the fake rev matching downshifts, which I dropped immediately after reading about it!
We are not all wired the same and some of us have had some short circuits induced.