Internet people tend to be more intellegent?

This is a comment I sent to the webmasters of http://similarminds.com after participating in one of their IQ tests tonight.

Your test results page includes this sentence:

"The internet population tends to be more intelligent so your percentile might be higher if the test taking sample was perfectly random."

That's a pretty general claim, and I don't know if it's totally true. There are a lot of people of average intellegence who take these kinds of tests on the Internet all the time. People killing time at work is probably your main audience. On the other hand, there are undoubtedly millions of people who aren't on the Internet who possess the kind intellegence you are testing (namely Visual Pattern Fluid Intelligence). Please don't try to make me feel better with unsubstantiated claims about how I've been outdone by the Internet Intelligentsia.