Furthermore, what would the usage of adblock be by IQ percentile? Opera's high showing may be due to it's adblock extension still not being as mature as those of Chrome and FF, and so the average Opera user might be less likely to use it. There's no doubt that Opera users would tend to be geeks and nerds anyway, but you could say the same thing of the top FF users. I'm not convinced that the methodology supports the apparent conclusion that the smartest people use Opera, just that of those who took the test, Opera users scored best.