[yjftsjthsd-h]

> it cannot possibly be explained by parenting or practice, because these children are so young and otherwise are very homogeneous

I disagree; parenting during the earliest years makes a huge difference. By the time they get to elementary school, some parents have been reading to their kids and some haven't, some parents gave their kids more educationally incline toys and some didn't, and some kids, whether by parental choice or by chance, have been watching more educational programs on television or less.

Early brain development is fast enough that even a few years of environmental factors can absolutely make a difference.

[Ellahn]

One of my points. Hard (And dangerous) to pin things on genes with so many factors at play.