It should have been included in the PC WEEK analysis. But these sites don't run static pages now, if they ever did. Today static page performance is irrelevant. You can get great performance for static pages from hardware that is essentially free. The obsolete 486s and 68Ks of the past make excellent static page servers.
Dynamic performance is what matters.
PC WEEK didn't compare the environment most system managers care about. Ask your favorite webmaster if you don't believe me. This is where we're looking for performance. Linux is starting to swamp NT Server with different pricepoints and options. That's a fair question for a benchmark to address.