SPIEGEL: Mr Carlsen, what is your IQ?

CARLSEN: I have no idea. I wouldn't want to know it anyway. It might turn out to be a nasty surprise. ... I am a totally normal guy. My father is considerably more intelligent than I am. ...

SPIEGEL: You became a grandmaster at the age of 13 years, four months and 27 days; and there has never been a younger number one than you before. What is that due to, if not to your intelligence?

CARLSEN: I'm not saying that I am totally stupid. But my success mainly has to do with the fact that I had the opportunity to learn more, more quickly. It has become easier to get hold of information.

For his humility I give him even more praise! (Source: Susan's Blog)