Which has the Faster Graphics card, Nvidia or ATI?

In April we posted a note that Nvidia's 6800 Ultra blew away the ATI 9800 XT. Then, in May we noted a review by CNet that claimed that the newer ATI X800 trounced the Nvidia 6800 Ultra. Now [H]ard|OCP has posted a shootout using the latest drivers and upcoming Doom 3 that claims just the reverse, i.e. the Nvidia 6800 Ultra, and even the lesser 6800 GT, beat the ATI X800XT-PE significantly. Of course, all of these comparo's used Wintel machines and were conducted at different stages of hardware and driver development. We hope the NVidia 6800 Ultra proves superior to the ATI X800 because it will come to the Power Mac G5 as an option late next month. ATI has made no announcements regarding its X800 technology and the Mac.