This version contains the full story.

Executive summary:

"But if you ever want to argue that Internet Explorer 6 users are
too stupid to upgrade, at least now you've got some empirical
evidence."

I think they would get the same result about the relationship between a
low IQ and using google to post to usenet.

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Internet Explorer users 'have below-average IQ'

http://www.telegraph.co.uk/technolog...verage-IQ.html

Users of the most popular web browser, Internet Explorer, tend to have
lower-than-average IQ, according to a survey of online habits.

PC World reports that a "psychometric consulting" firm called AptiQuant
gave free online IQ tests to 100,000 people, and then plotted the scores
against the browser on which the tests were taken.

It found that Internet Explorer users scored lower than average, while
Chrome, Firefox and Safari users were very slightly above average.
Camino, Opera and Internet Explorer with Chrome Frame were scored
"exceptionally" high.

"The study showed a substantial relationship between an individual's
cognitive ability and their choice of web browser," AptiQuant concluded.
"From the test results, it is a clear indication that individuals on the
lower side of the IQ scale tend to resist a change/upgrade of their
browsers."

Some people have suggested that there may be other factors at work.
Business Insider's Matt Rosoff points out that since IE is the default
browser for Windows PC users, anyone who doesn't know how to download
and install a new browser will be stuck with it - "which drags down the
average". And users of other browsers "include a disproportionate number
of computer geeks", which might bring their average up. Or, he admits,
it might be that "IE users really are kind of dumb."

Within the group of IE users, version 6 users score lowest, while users
of version 8 do rather better.

The overall chart shows that Firefox has the smallest percentage of
low-IQ users, and the largest of average or high-IQ users. A similar
study five years ago found that users had broadly similar IQs.

Jared Newman of PC World said the results should not be taken too
seriously. "They are, after all, comprised only of people who feel
compelled to take IQ tests," he said.

"But if you ever want to argue that Internet Explorer 6 users are too
stupid to upgrade, at least now you've got some empirical evidence."