[Timstone]

Why wouldn't it make any sense?
I tried playing Blood 2 on a computer with Win '98 and a 3,0 GHz processor under the hood. It was soooo slow you could classify it as permanent bullettime, or something like a gelatine atmosphere.
The computer tends to spread the workload, so it spreads the small amount of work that SE requires over an enormous amount of subprocessors. The distributing and combining of the information takes longer than if only half those processors were involved in the work. It's just the nature of the beast. 3,0 GHz processors weren't designed to play SE, they were designed to play Unreal Tournament or Doom 3 on full settings.