For those who doubt the PS3 performing worse than the Gamecube:
Without data for the "Total Others" region for the Gamecube, the PS3 has only sold only slightly better on a worldwide basis than the Gamecube ( http://www.vgchartz.com/hwcomps.php?cons1=GC®1=All&cons2=PS3®2=All&cons3=GC®3=Total+Other&align=1 ); the Gamecube sold noticeably better in Japan and at a similar rate in North America. It is likely that more than enough systems were sold in Europe and Australia that the Gamecube is ahead by quite a bit.