Evidence found that Internet Explorer users are generally dumber Firefox users says AptiQuant (leader in the field of online psychometric testing).
The users of Firefox were all slightly above average in IQ test results, while Internet Explorer users
tended to be lower on the IQ scale.
Other data supports this theory.....users of the older versions, IE6/7, scored lower than users of
more recent IE8/9 versions.
http://www.foxnews.com/scitech/2011/07/30/internet-explorer-users-are-dumber-study-shows/?test=faces