The NV30 will be faster, but not by much, 20% at the biggest lead, and on average 10. nVidia isn't god!
Some of guys need to wake up, nVidia isn't going to pull anything. Sure the NV30 will be faster, and better, but not by the margin you guys talk about. It will be like Geforce3 TI500 to Geforce3.
The 9700 is a monster and is feature packed, and I doubt nVidia will have the similair video technologies as ATi.