Its only 1 place above MW2. A game that promised to be the one to save CoD from stupid shit like MW2, is almost losing to it. And its only been out for around 3 months. That speaks volumes about how little people want to play it.
Not to mention anybody I have spoken to knows that BO was a huge let down, and are probably quitting CoD until they get rid of activision, and go back to either CoD2, or the very least CoD4.