I thought so too but some later still photos semed to indicate there was slightly less as the race progressed, possibly because of a redoubled effort to keep his knees up when pressed that might have over-rotated his pelvis which might have been been counter-productive. Certainly, his relay photos from Beijing show fantastic hip height which would seem to indicate full extension IMO.
I was told by a physio whose group was treating him thast the surgery on his torn pec reduced his ROM on that one side causing all kinds of compensation issues.