I'd go out on a limb and say that anyone who's been President of the United States is smarter than you (or almost everyone). It takes a lot of intellect and masterful knowledge of the political and social systems to become President. However, is George W. Bush smarter than the 42 other Presidents before him?
I'm glad that the author of this article didn't try to justify that claim. He definitely had more resources and technology available to him than the previous 42, so one could argue that a bit, but as far as raw intellect, I wouldn't say so. That's a hard argument to win.