Dude, in the review you linked, they are using P4 2.8G vs Athlon 2200+ on Radeon 9700 Pro card. If you compare P4 2.0G to Athlon 2000+, you can see the Radeon 9700 Pro performance on Athlon 2000+ is actually better than P4 2.0G even Athlon is clocked several hundred Mhz lower.
Personally, I switched my Radeon 8500 128MB card from OCed P4 2.4G to Athlon 2400+, I got 500 higher score in 3DMarks2001SE. So, Under same CPU speed, Radeon 9700 Pro actually performance better on Athlon than P4.