She's right on the money whichever way she leans, really. He's definitely no genius (at least outside combat), though he'd probably personally prefer to be thought of as nicer than he is stupid. (Generally speaking. It shouldn't be said that he's never used his apparent idiocy to his advantage.)

"As a matter of fact - I am. I was actually thinking of grabbing something from one of the new stands out here, when I ran into you. What do you think looks good?"