There is a huge difference between Itanium and P4/Athlon in the sense that it is a 64 bit processor of which it does have huge potential to kick the crap out of the P4 and the Athlon in the area's it is built for. But for everyday average 32 bit applications, the P4 and the Athlon are the major contenders here. Moterolla's G4 chip is seriously lagging behind which is bad news for apple but not for us PC users. AMD won't care which is why I said that I doubt Barton nor Tbred B will get considerably fast clock rates, although the potential is there through supercooling, insane voltages, and super super fast ram and FSB speeds. I don't think AMD plans to or even intends to fight intel with the Hz race as they are more intent on fighting them in the performance race and not just the price/performance race. $400 will get you a 2800+ clocked at 2.25GHz. Considerably slower clockrate wise than intel's 2.8GHz P4, but both parts cost about the same and perform on close levels. With the Tbred B, enthusiats can now keep up with intel as far as tweeking their system to be the fastest it can be. The #2 3DMark2k1SE score is an AMD Tbred B system on an nForce2 platform. That says something about AMD.
And when a 2.69GHz Athlon powered system can break 21000+ 3DMarks due to a 233MHz FSB, that's also saying something. Athlons have seemingly regained the ground as enthusiast tweeking CPUs over intel, as you don't really need super fance liquid gas cooling solutions just to get super high scores. AMD won't need to worry about keeping up Hz for Hz, but that chart shows them doing it, and I doubt that.