I smell cattle and manure. My Win 7 64bit Release Candidate boots relatively quickly still, even after installing anti-virus, games, and other garbage on it. It still is more responsive, and smoother running than my Vista 64bit install, with the same hardware.
Besides, I'd say iola has a bias and a profit to make off the results. I'd rather read something along these lines from a 3rd party, non-profit making organization that does several tests on several different machines, with Vista and Win 7 (Release version). And I'm talking old machines, new machines, Intel, AMD, etc. Let's talk real world tests.