You obviously didn't read 99% of the article did you? That 3% you reference was on one test at the very bottom of the page...and none of the tests posted were optimized to take advantage of the G5. Troll...
In case you missed it, I also posted Cinebench 2003 CPU render results for all three models of G5 compared to G4s, P4s, Dual Xeon, and Dual Athlon: http://www.barefeats.com/g5sum02.html
I'll be adding Photoshop results to the same page (with the G5 plugin) in a few days.