I had a fascinating correspondence with Grady Towers in the pre-email days of my Prometheus Society membership. Grady succeeded me briefly as president. I remember this essay coming out in Gift of Fire, the in-house publication poorly-printed in the days just after mimeographs. It convinced me to stick around and give the society one more chance. The essay starts with a discussion - fascinating but based on unreliable (and probably exaggerated) information - of William James Sidis, who, it is claimed, had the highest IQ in history. But the meat of the essay is the extended discussion whether the superintelligent are more likely to be socially inept and isolated. Grady and many others lean toward the explanation that people of high-to-very-high IQ are better socially adjusted than average, but that something starts to happen around the 155 range, and there is a large percentage of misfits.
The update is that Asperger Syndrome was little-known and poorly understood at that time. There is growing speculation that some manifestations of AS or High-Functioning Autism are common in the extreme range of ability for certain disciplines, which would be a confounding factor in measuring the social adjustment of those of ultra-high IQ. Incidentally, I no longer see or classify myself as an ultra High. I think test accidents and personality traits made it look that way, but were partly an illusion.