Our homeschool group just started a Cub Scout pack, including dens for 7/8yos, 8/9yos and 9/10yos. I didn't ask to move DS7 up because I know the kids and I think socially he'll do fine with the youngest group. If it were to go poorly, we'd probably take a year off and try to come back with the older group, but I don't think that will be an issue.
Of course, DS7 tends to play well with kids of all ages--I think having a brother 3 years younger helps. And many of the kids in the pack are GT, though I'm not sure about LOGs for them. That helps, too. And finally, homeschoolers are much more accustomed to and accepting of kids who are different, so the social issue isn't as great, even if there is a social mismatch. They all get along pretty well anyway.
The biggest issue I have seen is that people usually think DS7 is older than he is, and kids are surprised to find that he's only 7. That can cause some surprising problems. At a playdate, one 8yo threw a tantrum about something DS7 (then age 6) said because he thought DS was older and was making fun of him, instead of being younger and just trying to play along with him. When the other mom told the boy that DS is younger, he was shocked and kept saying, "Nuh-uh. He's older than I am. Yes, he is!" The boy just wouldn't accept that he had interpreted the situation completely wrong. DS was pretty hurt by the whole thing. It was a bad day.
I'm hoping we don't have that sort of trouble at Cub Scouts!
