Maybe this explains why - CISC not RISC

[TheMacintoshLady]

This article probably explains why my 350 mhz iMac with Os 9 is faster 
and more responsive than a G4/800 mhz with OS X on it for stuff like 
dragging text:

http://apple.slashdot.org/apple/02/10/21/1211236.shtml?tid=156