the Jan 2006 vid., his right arm straightens, but appears to be never straight. I too, see a slight head shift forward and slightly up prior to impact.
Driver vid on the range,,,same with right arm. And possibly not a straight left at impact, although nothing close to Lee Westwood.
Left foot appears 45*open with ball position appearing to be off or in front of the left toe. With this position, his shoulders are open.
Look at his bent right wrist at or near follow thru. Is he "hanging on"? I say this cuz when I obtain this position, it feels I never get the full release feel, and the left forearm roll...
Tom, my "fwiw"....