I don't know how to fairly judge the behavior of a kid who is underchallenged and likely bored and looking for any outlet. So, until they are adequately challenged, I think it is kinda meaningless. If they are never challenged, then I'd anticipated even more of the same.

This article talks a bit along these lines:
http://www.cedu.niu.edu/lepf/founda...ed.Students.Why.Do.Smart.Kids.Do.Suc.pdf