My bias is remembering what it was like for me and imagining what DS6 would want based on that -- my parents refused skips multiple years, despite my begging for them; I was exceedingly bored; none of my academic awards meant much since I hadn't actually worked for them, although I would have been quite surprised to not receive them... and yet, I was the captain of every team in h.s., lead in musicals, president of everything and those leadership roles definitely shaped who I am. These were things we considered, wondering what would be best.
Recall that HG+ kids are not just "advanced" they are on a different cognitive trajectory entirely.
Yes, this is what we have tried to consider, although I'm not sure we considered it enough. DS skipped from K to 2nd this year, but his performance and achievement and IQ scores are such that if he'd already been in first, they would have supported the skip to 3rd... and I'm feeling like perhaps we failed by not considering this. Another skip may well be in our future, bringing with it new considerations about his future, and if it is needed, I wonder if perhaps it wouldn't have been better to do them both now.
Although, it is informal interactions like the one Dude describes that worry me. Dude, hope DD's year improves!