Today Gene Heskett did spake thusly:
A lot of that may be your CPU and RAM. These are a few times faster than the numbers Claude cited at first, which he said were on a 2.66 GHz P4.
And I think thats a real clock speed, the xp-2800 is propaganda as its actually running at 2Ghz.
But it's around as fast as a 2.8ghz P4, hence the name. P4s were poked in a strange way to make their clock speeds "faster" (I believe they had an unneccesarrily long pipeline or something, someone explained it to me once...)
It's why the new (well, after P4 - Centrino) laptop chips had slower clockspeeds yet were loads faster than the old P4s...