Glad to hear Max that you got that info....JC believes his method is constantly evolving. My last clinic with him was in Portillo, Chile....something that was very clear is that he's not focusing on a very narrow stance the skier has to force his legs together...it's where your feet align or stand naturally...
Having said that, I believe as living proof for myself, sucesses my wife and numerous others have had (including Peter Keltey's wife), John system provides SOMETHING usable in bumps, pow and crud. We are skiing more bowls, more bumps, more glade more steeps with more confidence using techniques learned from him. Still, I find many PMTS movements applicable and make both systems work for me.
For us....what I think the primary skill sets received from CSM were speed management and turn shape in bumps and crud with less energy expended, fewer hard angles, simply just easier on the entire body...pretty much sums up the rewards of his system.
Max, our perception of what we consider expert skiing might differ too....I've seen JC and his instructors ski monster bumps at warp speed, effortlessly and it sure looks pretty darn expert to me.
Summing up my thoughts without wearing out this topic, his system may not be for everyone, it may not employ every PMTS principal, but using solid pole plants, tipping, effective use of the skis four edges, given the performance results I've experienced, there's no doubt in my mind that JC and his cadre, are expert skiers, and of course....my perception.
Only thing left to do Max is ski together, mabe someday....it would be great fun to compare notes! All the best,..g