Have you guys seen the thread at Beyond3D that explains why the Anandtech review is showing bigger gains than some of the other websites? Apparently Anandtech did not use AA as they thought they did when running the benchmarks according to this thread:
Beyond3D Thread on Anandtech's SM3.0 Testing
I thought the score discrepancies seemed a bit off between some of the websites. The 6800 Ultra is still getting a nice performance boost but it appears both equal level cards are about the same performance - faster than hell which is not a bad thing.