It's where a lot most of the kids in my age(17-25)started.
I raced and did all that Nancy Green stuff, along with some freeride coaching with Chris Rubens (before he went pro). I did the ski programs till I was about 11. I had my first twins by then (Line 1260). Looking at where I am in skiing now, I am happy that I raced, and took all those programs. They give the kids the best technique. Being 19, and seeing all these younger kids ski, you don't always see it, but you can tell who took the programs.
I don't ski park though, so I have yet to put my childhood racing and skiing techniques I learned into it.