Quoting recent article
"NVIDIA Corporation today announced that its GeForce™ 6 series of graphics processing units (GPU) is the overwhelming choice of publishers and developers participating in this week’s Electronic Entertainment Expo (E3). More than 500 PCs equipped with NVIDIA’s latest generation GeForce 6800 GPUs will be used by over 30 game publishers and developers."
That means the game devs don't care if one card is slightly faster than another. PS 3.0 matters to them.
Just got my new machine working, a P4 3.4 with a LeadTek 5900XT, and let me tell you, it's schweet. 3dMark03 score is 5539, right up there with the benchmarks from review sites. Nvidia will be rewarded for embracing new technology. I'm staying with them.