That is REALLY interesting. Years ago I stretched between all PL'ing movements...which I was later told was limiting my top end strength. I had an easy front and side split AND pretty good PL numbers. Hmmmm....time efficients if nothing else. I might give something like this a whirl again and i will do some searching on the chap you mentioned.
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."