This issue has been rehashed in other places, like
Slashdot but to repeat whats already been said:
Word as benchmark= joke. a WORD PROCESSOR? from the same company that makes the PC OS?
Premiere as benchmark = plain stupid. Premiere has been basically canceled as a Mac app, mainly because it has been completely trounced by Final Cut.
Photoshop = optimized in a couple of days for the G5, (ie, quick hack), G5 still wins.
interestingly, they swapped in an Opteron system in this test, without mentioning the cost. it costs roughly 2k more than the G5.
Quake3 = highly optimized for PC code, ported in a WEEK to mac os X. (read as bad thing to benchmark when code is completely unequal)
Quicktime = retarded test. its just a wrapper for codecs. without saying which codec they use, theres no point in comparing anything.
lies, damn lies, and statistics.
in other words, these completely unscientific benchmarks are misleading. While you can argue about the speed of the G5, its best to go elsewhere for facts.