I was in a program like this in 5th and 6th grade. I believe I was among the lowest achievers in the class, both by grades and extra curriculars. Of those I still keep in touch with, I believe I'm still among the lowest achievers - I never finished college, among other things, although I'm certainly doing fine for myself professionally. The class fed to two different high schools so I lost touch with roughly half of my classmates, but as far as I know they all finished high school and all that I know of finished college or university. Just another perspective.