Actually, I am not surprise at all.. people are saying this for too long.
Perhaps, it's the school education or complacency.... who knows. But it does not mean everyone is stupid, it's just that they are not stimulated enough. Maybe US just need soldiers for their imperial army, can't have them too smart. Smart people tends to ask more questions.
http://www.youtube.com/watch?v=pfRUMmTs0ZA&search=stupid%20in%20america