Having toyed with the Stack and Tilt concept a bit more on the range, and having had the privilege of working with Mac O'Grady back when he was still mad at Deane Beman, I now regret my initial remark that this is Mac Made Easy. Several elements are quite different from Mac's teachings, particularly the takeway (was that P2 or P3!?) and some of their thoughts on the role of the right leg.
Anyway I haven't been able to follow the little community within a community that has developed on the original post here, which is up to 327 comments.
The latest Golf Digest installment's best component is the input from other
jealous instructors trying to debunk the potential of Stack and Tilt.