This is a function of how gifted kids learn social skills. Before adolescence, children primarily seek approval from parents and teachers. Gifted kids get this in abundance, and learn how to earn, as you put it, social currency with adults (at least those who value academics), which is not the same as how to earn social currency with their peers in adolescence and early adulthood. And of course, gifted students learn more quickly, and are reinforced more. It's a perfect environment for developing anti-social behaviors.

For academic achievement, the majority of research backs up your thesis, and it isn't even a tradeoff, where you get better academics at the expense of worse socialization. Gifted programs don't work. It is far better to accelerate a student to a higher grade, even if it means putting students in classes with much older students (accelerating a gifted student is the most effective positive intervention that can be taken in K-12 education according to Hattie's recent review of meta-analyses, Visible Learning, and nothing else is close). It pushes them academically, and more often than not, helps them socialize, because they learn how older kids interact before internalizing too many abnormal frames and social habits.

I know a gifted kid that was accelerated to higher grades. Lonely and sad. Not a lot of friends that much older than him; no dates; no hanging out. 16-18 yr olds don't want to talk to a 14yo, especially in high school.

So maybe we have to work with what we've got - 14yo that can learn fast - so teach them fast. Can't do it in the regular classroom, so gifted class. Socialization is apparently an issue there (why? same age group as other kids have, same teacher - what's really different?) so work on that.