If I read TheSource's prelim correctly he says: 150.000 RESERVATIONS for ToS2 and 210.000 PRE-ORDERS for MGS4 (I assume that's without the bundles).
I assume that reservations are actually reservations by costumers. That would mean it could definitely do around 180.000 first week.
we'll have to see though. I hope TheSource will explain here what he means with the numbers.