That's certainly true. "If you're routinely the smartest guy in the room, find a different room."

And yeah, in a "post-Singularity" world that contained a lot of different ranges of intelligence I would probably tune my intelligence to whatever range I was interacting with regularly, which might involve variable intelligence levels, or even maintaining several different disjoint chains of experience.

And I'm perfectly prepared to believe that past a certain point the negative tradeoffs of marginal increases in intelligence outweigh the benefits.

But at least up to that threshold, I would likely choose to socialize with other people who tuned themselves up to that level. It's admittedly an aesthetic preference, but it's mine.