It seems ATI's benchmarks were flawed pretty badly.
The Tech Lounge and [H]ardOCP have some different numbers to show you.

As for calling one video card a ?winner? over the other, it just does not seem feasible and would likely be irresponsible to do so. ATI?s X800 series has not thrashed NVIDIA?s 6800 series silicon as many expected. Half Life 2 simply plays great on video cards from both NVIDIA and ATI. So let?s make this clear