@shawbridge Thank you for your perspective. We are looking at enrollment in the fall of 2022 so still lots of decisions ahead of us. We might be virtual then too, who knows. While I am a big proponent of gap year, it does depend on what one can do with that gap year. We will see how her interests shift in the next year. I do suspect she will be getting anxious to get out of the house and go away to college. She is the type who wants to be surrounded by likeminded peers so college is a way for her to find her fit and community. I am not sure we can actually offer her that if she stays with us for additional year. We visited a couple of colleges this week and she got really excited about one of them and endless possibilities of what she can do/study in college.
@cptofthehouse I do think for most of the kids skipping a grade or two is not a matter of being a prodigy, but a necessity of finding a right environment for educational and emotional needs. Not sure that the expectations would be to become next Nobel laureate. Just want her to be happy and not suffer through useless repetition and boredom 
BTW, how are your friends doing now? Are they happy to have started college at that age or do they have regrets?