By The Numbers

28 percent of atheists have post-graduate degrees or professional training, vs. 15 percent of non-atheists.
3 percent of atheists are "strong Republicans," vs. 16 percent of non-atheists.
Atheists have an average of 1.3 children, non-atheists 1.95.

Star Tribune, September 15, 2007 (2005 Baylor University Religion Survey and Barna Group)