I am 100% certain that ioi will adjust his sales numbers for Rock Band, Zack & Wiki, and other games.
Like always said, his sample size for certain kinds of stores (ie, general US retailers) is very small, or nonexistant. These stores cater to a broad audience, and in Rock Band's case, are a huge boon to sell games like Guitar Hero, Rock Band, and other semi-casual and core titles.
So with the new NPD data out, you can be sure that ioi will adjust the games that he's off by more than 15% on...
Back from the dead, I'm afraid.