[nevinera]

Pretty much, yeah. If those kids that aren't going to kindergarten have exchanged that time for neglect - sitting in front of a television for an eight hour stretch, for example - then they will certainly be worse off for it. But the article didn't demonstrate or investigate that, it went straight from "less enrollment" to "less prepared", as if kindergarten is the only realistic place to learn such important skills as "basic respect" and "don't hit people".