Why do 360 fans want to go NA only as if the rest of the world doesn't matter? More video game revenue comes from outside of NA then from inside NA. With the Euro and Yen worth more relative to the dollar a sale in either other region is like 1.3 or 1.4 sales in NA.
If the 360 pulls away from the PS3 in NA and the PS3 improves in the rest of the world its advantage PS3. Until the dollar strengthens or at least stops weakening the rest of the world is going to continue to matter more relative to the US.
Saying "oh go one region only for this stuff!" also smacks of wanting to only win selective fights. If you would like by that token we could go Japan only and say OMG PS3 PWNS 360!!! The important one is worldwide sales, since thats what determines revenue at the end of the day.
By comments like the numonex one I'm reminded of an Eddie Izard Comment in front of an American audience "do you know there's other countries? Just checking"