Sorry but it is you who is making the serious errors. 3.2 million through October includes all of the Americas. US alone through October was only 2.9 million. The proof is on many sites. http://www.kotaku.com/gaming/npd/revised-npd-shows-lower-sales-good-flamebait-222038.php http://www.joystiq.com/2006/12/14/november-npd-revised-data-reveals-current-install-bases/ http://biz.gamedaily.com/industry/feature/?id=14737 According to those, US alone was 3.4 million at the end of November, which counts 510,000 sales in November, so at the end of October it was 2.9 million. Your estimate of 1.5 million is much too high for Canada and Mexico, their market is only about 10% the size of the US market. The 3.2 million figure I quoted includes US, Canada and Mexico. So again 3.2 + est 2.0 in november/december + 2.76 rest of world = 7.96.
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