If you have this article, look at the pictures of Adam Scott and Tiger Woods on the last page of the foldout. The clubface positions he's referring to are still what most teachers would call square to the arc, or square to the swing. The reality is, you often see players with more clubface rotation <b>through</b> the ball than Tiger is pictured here, but they definitely aren't claiming anything new by those examples.
Now, in regards to the manner in which AJ wants you to take the club away, with your" right palm facing the target as long as possible...whoa.
The whole new thing for me was this"
Take your normal grip and open the clubface by about 10 degrees at address."
I had never seen this advised before. I think this is the key to why some are having success, it makes it harder to hook off the planet while still getting the extra clubhead speed from a strong roll. The hitting down thought prolly gets the outside in swinger hitting on a little better plane as well. It also makes it harder to throwaway. One prominent TGM instructor, when asked for one fast tip to kill throwaway said hit down on the ball, it makes it almost impossible to flip.
I am going to go try all this myself just for some fun. It seems myriads are finding a very good increase in distance.
Regarding his palm forward on the backswing, one wonders if all this is close to an angled hinge backswing with a horizontal hinge downswing, made possible by the open clubface at address? This would take out the complication of the roll in the backswing (which many high handicappers would struggle with) while still allowing a decent roll for power.
I think this swing might help higher handicappers more than anything. Feedback seems to show a lot of happy peeps.