Apple bashing in disguise? Tech Extreme has an article entitled proper benchmarking where a Pentium III 800Mhz is compared to dual G4s at 500MHz running Quake III: Arena. They conclude by stating that benchmark settings and methodologies should be properly disclosed.
For those completely new to benchmarks, Ace's Hardware did a nice primer a ways back called benchmarking your gaming machine. The game benchmarks are dated but the guide itself has managed to age like fine wine.