I respect your opinion, but I disagree completely. While it is true that I cannot present a scientific evidence of some biomechanical tests (although I'd love to be able to run such) - there is no better evidence, IMHO, than analyzing common denominators of the best ballstrikers swings. I do not care about best players, I care about best full swing ballstrikers.
We can easily note that the swings of the golfers who are claimed to be the best ballstrikers on this planet by experts, i.e. their fellow pros and top instructors and coaches, have some common points in their motions. The very vast majority of them were one planers (with their lead arm NOT letting be above their shoulder line at the top) with perpendicular relation to the spine; all of them were double shifters to the EP in the downswing; not coincidentally, all achieved this EP relatively early (EEP)...not mentioning here some other points - maybe later.
Hogan, Knudson, Moe, Trevino, Snead, Furyk, Boros, Thomson, Middlecoff, Nelson, Jones, Lema just to mention the most important names if someone are guessing whom I am talking about.
Cheers