@Laoldar, this game is definitely exhibiting strong initial sales--many Xbox 360 owners got the console in anticipation of the game, so they were likely to get the game within the first 2 months of release. I do there probably are strong long-tail sales from existing Xbox 360 owners, but I believe new Xbox 360 owners will continue to pick up the title.
I am not surprised that Halo 3 is skewed toward US purchases and I think the current forecast considers this.
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I am not surprised that Halo 3 is skewed toward US purchases and I think the current forecast considers this.