The prometheus society article on the first page addressed the issue of people with high IQs having social issues. It seems to largely be a problem to the degree that one is less able to find people near the same range of intelligence. Also, if one is in an upper-middle class family with lots of opportunity to develop one's intellect, positive adjustment is more likely than if growing up in a poor neighborhood where putting food on the table (and possibly even not getting shot/raped) is the emphasis.
The Prometheus Society > Articles > The Outsiders
"Hollingworth points out that the exceptionally gifted do not deliberately choose isolation, but are forced into it against their wills.
These superior children are not unfriendly or ungregarious by nature. Typically they strive to play with others but their efforts are defeated by the difficulties of the case... Other children do not share their interests, their vocabulary, or their desire to organize activities. They try to reform their contemporaries but finally give up the struggle and play alone, since older children regard them as "babies," and adults seldom play during hours when children are awake. As a result, forms of solitary play develop, and these, becoming fixed as habits, may explain the fact that many highly intellectual adults are shy, ungregarious, and unmindful of human relationships, or even misanthropic and uncomfortable in ordinary social intercourse"