Having said that, I'll be very surprised if the R600 isn't noitably faster than the 8800 GTX.
I still think that the R600 will be slower in older apps and faster in newer apps.
I think the R600 was designed for DX10 more than legacy DX8 and simple DX9, and only the rare DX9 game would show it the equal or better to the G80.
I have a strong feeling that it will be features of the R600 that make it better in some ways, but it's hard to sell on that compared to 3Dmarks and results in more 'usual' games.
Expect the R600 to do well in some particular configurations of FEAR, FSX, and Oblivion, but overall to no be impressive, but then when DX10 games actually show up then it'll have a lead, whether noticeable or minor.
That's just my feel for it based on the current areas of strength for the G80, and the comments even in that interview about the potential strength of the R600.