Depends on where you live. We sent our kids to private school in California to make sure they were adequately challenged. There may be other groups that do so, but in my experience asian, jewish, and engineer parents will generally find a way to put their kids into the most demanding program available that their kids can handle, with a view to getting them into the best college possible. But I was living in NY, Boston, San Jose, and the culture may be different. In those areas, among the "top 10%" kids, the competition is quite intense and stressful.