They used the following test system:
Here are the results. They ran 3DMark06 with a 1280 x 1024 pixel resolution, 4x AA and 8x AF:
Intel Q6600 overclocked to 3600MHz (400MHz x 9) NVIDIA 650i Ultra based motherboard DDR2-800 memory running at 5-5-5-15 Windows XP SP2 NVIDIA ForceWare 167.26 drivers
|3DMark06||8800 GT 512MB||8800 Ultra 768MB|
|SM 2.0 score||3982||4643|
|HDR/SM 3.0 score||3343||4391|
The scores look pretty good if you take in mind that the 8800 GT will cost much less than the Ultra card.