G5's aren't that great anymore. Most, if not all, 2007 Intell Macs outperformed them at nearly everything. Even Intell's modern budget Pentium line is more powerful.
Yeah at this point I realized how dumb my comment was. I was trying to say that G5's were the pinnacle of performance and innovation for desktop workstations back in the day. While my 13" MacBook Air could probably score higher on GeekBench than most G5's (perhaps not a Quad), they are just kinda unique in their architecture, like a lot of PPC Machines!