I think NT's are prone to it...
I think there is a blend between - people asking question and the NT's answering the question, but unaware of what the other person knows already - or the question wasn't really what they wantedto know
NT's often can be pretty dissmissive, without sufficient exposure to a person (NTJ's). The judge if a person is worthy of them spending time with.
so yes in my experience any NT can be condesending.