The empathy part is a given for sure. The entire principle of anxiety rests not necessarily on what others think of you, but how others are impacted by your decisions. At least, that's how I feel about it. As for the high IQ part, this is often linked to autism, i.e., a condition with severe social ailments (both Albert Einstein and Alan Turing have been suspected of having this condition).

As for myself, I'd like to think that I am more than just average intellect but I can't say for certain. Either way, IQ does not often measure intelligence particularly well. It misses many factors. With that in mind, it is still the most efficient method but I personally believe it must be revised.