This guy (and the whole site) is VERY biased:
1) The main page is very Mac-browser unfriendly (Craploads of pictures, wierd frames).
2) "As expected the Mac did worse....." The "As expected" makes it biased.
3) If he put up a PIII 1 GHz, a dual Athlon 1.4 GHz, and a Dual 1 GHz, and a single 1 GHz Mac, the Macs would OWN the other two. "Macs are much faster than PCs at comparable speeds" The comparable speeds part makes the statement correct.
4) Duh! If you put something about 4 months old up against something else of TWICE the raw speed and that JUST came out against each other, which do you think will win?
5) The reviewer stated that the same settings and codecs were used in all tests. That means that the Mac was stripped of it's dual processor capabilities and it's G4 optimizations, totally crippling the thing! but that would ALSO cripple the P4, as P4 optimizations would be turned off, and the Dual capabilities of the Athlon would be turned off too. If the settings were any different, than it should be marked as such.
6) I am unable to reproduce anything even CLOSE to these numbers, with the same hardware and settings.
So, to sum it all up this guy is totally full of shit somewhere.