(Yes-- to the above post.)
We didn't really have a feasible option other than radical acceleration without a MAJOR move and a major re-alignment of our needed income/careers/lifestyle otherwise, and we'd already done that once to deal with medical issues in our child (which often present competing and incompatible needs). DD is still quite handily one of the highest performing 4 or 5 students in her graduating class, but at least the difference isn't so large that she can't relate to her classmates as a high-achieving 11th grader. Most of them figure out that she's "young" for her grade, but they also mostly think that this means 15 yo, not barely 13.
Ditto to the friends comment, as well; DD has literally ONE friend who is remotely similar to her in age (within 6 mo older) and that friend is HG and +1 grade accelerated. DD's best friend is a male age-typical classmate who is HG; the two of them joke that they share the same brain, in spite of the gender difference and the three years separating them. Neither of them has ever had a close friend before now (this past year, I mean). Partly this is because we live in an area without true gifted magnets, so neither of them has been able to find true peers very easily.
If we had been able to enroll DD in a gifted magnet which was suitable, we'd have done things very differently. Or we'd have tried it, anyway.