i don't know why everyone is so sensitive on this thread. all of you coaching types criticise one another's approaches. even the "celebrity" coaches.
as someone who plays tennis for fun, i can make my own mind up when comparing the various approaches. It's actually useful to see different coaches disagreeing on specific points, or even teaching philosophies.
debate can be useful when people are knowledgeable of the topic. most people here have played a lot of tennis and/or received a lot of instruction/coaching. if we only posted on threads we agreed with this place would be a lot less useful.