I think enough's been implied in the books to hint that magic may be recessive, so yeah, I agree that having Dudley would not have been a stretch by any means. I can't see it impacting Harry's popularity in school all that much, but I do have a tough handle on Dudley and that makes it harder to decide what might happen, because it also partly depends on where he ends up. Which I'm not inclined to speculate right now because he was painted with such an unflattering brush that it would be insulting to any house that gets him. :P

Evy//Ravenclaw//6