LOL Clunk
First link:
http://www.digital-daily.com/video/d...ark/index3.htm
It is rather inconclusive of course, almost irrelevant at the moment - we can't really garner much from DX10 as they won't spend much time developing drivers while it's a platform that's hardly used. As more titles are released, both drivers will improve.
That said, it's fair to say the HD2900XT is a much better performer (compared to the 8800s) in DX10 than it is in DX9.