Why do some people think Obama's IQ is 127?

His IQ hasn't been released. IQ 127 is almost Palin country, but this is a guy who graduate with high honors from Harvard Law School (and no, Affirmative Action cannot affect that) and worked as a professor of constitutional law. I've seen 145 as a low estimate. In general, I'm not impressed by those who claim that he has a low IQ; if their IQ matched his, they would know, merely from listening to him, that that isn't the case.