I read the link, Piazzo22, and can see how this could help certain people, improvisers the most. For you to say C.C. Changs method is nonesense, this must mean you have tried following his way for a good period of time, and did not gain benefit. Even then you must admit others might benefit from it. My experience so far, about 3 or 4 weeks, have been positive. I sum up the method in simplistic terms by saying it is like if you ever rode in a car going around 90 mph for awhile, then went down to 60, the 60 would feel like you were crawling! This is the same principle of Changs. Small segments much faster then needed, stringing them together HS, then the goal speed will feel slow. I have experienced this. My problem is with such long passages having the endurance to play it at much faster than needed speed HS. Fingers tire out. My lastest theory is that I must keep trying longer segments, and when it tires, wait a couple of seconds and try again. I seem to be able to repeat it with only a couple of seconds. Hopefully, I will increase the number of notes at this very fast speed. It is 189 on the metronome. I do appreciate the link you gave and am interested in what you think about the above.
Nick