Many of the games tested were cpu limited thus equal performance.See what happens when aniso and fssa is on,radeon 9700 pulls numbers like 200%-400% faster than GF4.
Try the UT2003 numbers at anands(Ut2003 not cpu limited)and you'll see the performance gap.
Noboby can know if nv30 will be faster than radeon 9700 because we just don't have the specs or a board to test it.Nv30 might be faster than radeon 9700 but don't expect nv30 to kill it.
It would be a good thing to wait and see what nv30 offers(first nv3dfx card). I just want nvidia to keep to their release dates(hopefully november) and not pull nv30 into 2003.