Leo-j you must be joking, or blind yourself. PS3 had both the largest absolute drop and the largest percentage drop. The numbers speak for themselves.
http://vgchartz.com/hwcomps.php?cons1=Wii®1=Total+Other&cons2=PS3®2=Total+Other&cons3=X360®3=Total+Other&start=39453&end=39460
Sys Rltv Abslt
Wii 43.85 64360
PS3 54.11 67741
360 47.75 45589