The answer is yes — but only in certain circumstances and that "yes" comes with a whole bunch of caveats. At Discover, Emily Sohn has a nice basic primer on what we know now about intelligence testing and what your score on an IQ test does and doesn't mean.
A bunch of sites are reporting that the "study" that claimed to correlate IQ with browser choice was a hoax. The funny thing is, the hoaxy part everyone's up in arms about is that the correlation was faked. But surely's the most damning element of this "study" is that it used IQ as a meaningful proxy for "intelligence." If someone came up with a study that correlated star-signs, biorhythms, Meyers-Briggs types, or auras with browser choice, and then it was revealed that the data was fudged, would the fudging really be the most damning fact about the study's validity?