The phase of the life issue is touched upon in the link. It discusses how the accelerated kids are often happy because they have new peers who have similar inte

The phase of the life issue is touched upon in the link. It discusses how the accelerated kids are often happy because they have new peers who have similar interests. It's a difficult issue to solve. A 7-year-old who is 4 years ahead of his age group peers has little in common with his peer group but is very much younger than 11-year-olds. The study in the link appears to indicate that the accelerated kids ended up happier and more fulfilled as adults. I think that's a very good argument for acceleration.