According to this:

Internet Explorer users have a lower than average IQ, according to research by Consulting firm AptiQuant.

The study gave web surfers an IQ test, then plotted their scores against the browser they used.

IE surfers were found to have an average IQ lower than people using Chrome, Firefox and Safari. Users of Camino and Opera rated highest.

The report has sparked anger from IE supporters, who have threatened AptiQuant with legal action.

Researchers gave over 100,000 web surfers a free online IQ test. Scores were stored in a database along with each person’s web browser data.

The results suggested that Internet Explorer surfers had an average IQ in the low eighties. Chrome, Firefox and Safari rated over 100, while minority browsers Opera and Camino had an “exceptionally higher” score of over 120.

I can’t help noticing that the IP addresses belonging to the Anglican Church of Canada that access this blog are all using Internet Explorer. It must be a coincidence.

Update: The BBC is now reporting that this was a hoax.