It's obvious that the slew of new releases this week would have an impact on retail store sales. This data is based on US sales of new releases (which all primarily launched September 6th, 2011) and as expected the top game titles sold last week are not a surprise. What is a surprise are the games that made the worst sales list.
This article is based on sales of Week #36 of 2011, i.e. from September 5th thru 11th. However, and based on user/readers opinioins, make a mental note that it's extremely likely these details will prevail for the entire months sales stats.