Image of brain courtesy of Microsoft Office
P.S. You might also be interested in a new article I have written for YCN: "3 U.S. Government Websites to Bookmark"
Update (1/10/2013): This article in Kurzweil.net notes that two research studies, which were completed in 2012, fail to support the above hypothesis. However, even more interesting, the largest of these studies noted a strong correlation between video game playing and some aspects of I.Q.