We did a blog post referencing a study:
http://blog.markiter.com/#turk
http://behind-the-enemy-lines.blogspot.com/2008/03/mechanica...
Which has been updated recently. Some high quality data presented in a clear way.
http://behind-the-enemy-lines.blogspot.com/2010/03/new-demog...
* United States: 46.80% (65% female) * India: 34.00% (70% male) * Miscellaneous: 19.20%
