[dodger]

I am not sure that is the point of Homer's book or of Yoda's great instruction here. I agree with you GPS about the lack of players advocating TGM. But, look at their swings. Lets take Lucas Glover, US Open champ. Lag, flat left wrist at impact, float loading... He has components we can see in his swing that are in the book. So does every player on tour. Mr. Yoda knows the book and can teach. These are two separate things. If I get my daughter, who is just learning to play, to move her hands through impact before the clubhead, she will get a flat left wrist. I am not teaching her from the book, I am using the toolbox Homer Kelley provided to give her alignments that are golf like. Swinging left is a prime example. Kevin taught me to swivel after followthrough, really improving my swing. The swivel takes the club left, which is nothing more than being on plane. Teachers still need to be able to teach, regardless of what they know. Communication. Yoda has it, so do other teachers.
I think if you and I took lessons side by side, Yoda would tell us different things, that is teaching. Putting every student into a pre-conceived model is not. I find it hard to disagree with the Yellow Book when I see its examples in every tour player. Tell me one tour player that does not exhibit the three essentials or the three imperatives. Does the golfing machine have a player endorsement? Every good one. Tiger, regardless of swing change, has a steady head, flat left wrist, lag... Like Patton said about Rommel: " You magnificent Bast###, I read your book." Maybe Tiger didn't read it, but his swing is in the yellow.