Nintendo Financial Results Briefing (Fiscal Year Ended March 2008)

[TWRoO]

Actually in that chart the Wii is about the same on average as VGC, but on VGC the PS3 is about 20k higher each week and the 360 is about 10-15k higher.

So either that Nintendo chart is only for a few Eu regions (and VGC is undertracking Wii)
or VGC is overtracking both PS3 and 360 by a similar percentage each.