Good figures! According to VGChartz the PS3 install base at the end of March for 'other Europe' was 506K. If true the Benelux accounts for about 60% of "other Europe" sales.
The PS3 did especially very well in the Belgium. But for Switzerland Sony announced they already overtook the 360 install base early this year.
Personally I don't think the Benelux accounts for more than 50% of "other Europe" sales. If this includes countries like Russia and such, I would say much less.







