The Guru of 3D himself has conducted an interview with Creative Europe, talking about what else but the NV30.
"Now that's putting me in a really difficult position because as you know NVIDIA are pretty consistent with their "we don't talk about unreleased product" position but here is what I think I am safe in saying ...(bear in mind I have seen specs and simulations not actual hardware). Based on what I've seen NV30 will retake the performance crown from ATI by a significant amount. Obviously I can't comment on clock speed etc. but its fair to say that we should see a significant jump based on the fact that NV30 is on 0.13 and 9700 Pro squeezed every last cycle out of 0.15."More information at Guru3D