If the 360 didn't outsell the PS3 last week, which is entirely dependent upon NA, where the price cuts have just taken place, then that's a bit of a problem for the 360.
After two weeks with a new pricing scheme, it is to be expected that sales will have dropped slightly over the week prior and it's initial discount sale rush, but they should still post higher sales numbers than the PS3, which has no current catalyst to stimulate further sales.
JPN sales dropped about 50% over the week prior and will probably continue to dip and equalize over the next two weeks until the next catalyst hits, whether that be the next big RPG release or seasonal holiday sales.
Expect similar trends to happen in NA, although not as abrupt. There will likely be a drop, but it won't be a 50% drop over last week's figures.
Either way, it will still be enough to outsell the PS3.
If not... then it's up to holiday sales and the theory that leaner holiday sales in NA due to the economic downturn and a cheaper 360 means more units sold than the competition.







