WADESWORLD - many thanks for the connection... I checked out Shawn and was impressed. I'll contact him because I'm putting together an international network of teachers who teach in this way. The analysis I've just published backs up their methods strongly so they can use it to add credibility to their methods (not that they probably need it...).
Your other point about being able to learn and achieve high standards through club manipulation is of course true. After all, most of us were taught that way. The essential point is that it's slow and frustrating, because it's working against our natural, innate learning systems. We might get there in the end - top players obviously do - through sheer repetition. It's the repetition that improves us - not the specific technique we're repeating... We have decades of research from other sports to show this.
The problem with a detailed technique approach is that it creates 'internal focus'. Sports psychologists in many sports know that internal focus destroys performance.