How is the Folding performance on the dual-G4 machines? I found that an Athlon XP PC is twice as fast as a fancy Apple system with a G4 of the same MHz rating as the Athlon. Aren't Macs supposed to be twice as fast as x86 systems? For example, the Athlon can process one frame of p692_L939_K12M_int in about 10 minutes, while the dual-G4 takes over 20 minutes. Is there something wrong with the Mac or the Folding client, or is a 2-year-old Athlon PC really a faster system than a new PowerMac G4?