There is an article somewhere on this board that I hope someone will point you to, as I have forgotten where to find it. It's about how, contrary to the commonly held belief that gifted kids are socially behind, they are actually socially ahead in their expectations for friendship and it comes across as not getting along just because they are different. It sounds like your DD has high expectations of how people ought to behave, and the problem is that they don't. Hopefully someone can point you to that study, or I can figure out where it is, because it was a great help to me with my DS.