Here's something worth noting.
From Microsoft NPD Release:
"Since its U.S. launch on Oct. 21, “Fable II” has sold more than 1.5 million units worldwide for Xbox 360 in the first two weeks of retail, making it the fastest selling RPG on Xbox 360 and the most popular game, across all platforms, in the US in October. (October NPD data and Microsoft Internal Data)"
It's at about 1.33 mill on the site after 2 weeks. So it might be about 200k or so under on this site.