I read that article last night. It is impressive, and shows just how easily it will be for Intel to scale to 3 Ghz. AMD is going to have a tough time matching Intel until they can shrink the Athlon down to .13 micron and get it's clockspeed up. I'm not expecting this until April at the earliest, and I doubt any real quantity of processors will be available until June or July. (AMD also has an entirely new CPU core set for a late 2002 release - codename "hammer".)
The only thing odd about those benchmarks is that in many cases it appeared the 800 Mhz jump in clockspeed did not translate into as big of a performance boost as would be expected. That tells you that something is bottlenecking the system. It's likely that before the P4 really gets to 3 Ghz you are going to see some changes in other system components to resolve those issues.