[purehitter]

MacDonald's exercises seem to be arms, legs and feet focused. Little core strength.
Jeff Hulls Video in Gallery on 1st move down with the Ugh ! seems to be hips and core muscles.
Ben Doyle chips from feet.
"Sit Down" seems to be a core muscle function
Tiger's snapping the knee to extend the radius causes the throw out and down to be faster.
McHatton's constant motion to drag and produce throw out is caused by "golf hips"
All of my previous experience with Doyle, Tomasello, Sloan, Hebron McHatton, Schaeffer, Ness, and other TGM instructors has been focused on pivot. All of these guys are successful, smart, knowledgable and have accomplished students.!
It would seem to me that there has to be a balance and synchrony involved in the motion. I would hope that civility would be maintained and all you experts could discuss it in a meaningful way. All I know is that Ben and Greg constantly talk about having to work on the pivot.

Read the first paragraph of 7-12 in TGM book. The first sentence is for power the next two are for accuracy. A more passive pivot provides power and accuracy at impact. An aggressive pivot will provide power and reduce accuracy at impact.