DKII on 21 March 2007
Wii is currently selling 30k more than 360 a week in NA, 60k more in Japan, and let's say 40k more in PAL regions each week. Total that's about 500k each month. It'd still take 7 months to catch 360 worldwide, and a lot longer in NA. And that's assuming Wii sales never slow down (can't really go up when you're supply-limited at this point) and 360 sales never pick up (like with the Elite model release or Halo 3 in Sept or something). July is just impossible worldwide, and completely ludicrous for NA. Even July '08 for NA would be a stretch.
