"In terms of the linked article, I had multiple issues with it. (Not the least of which would be the over-arching theme that a classroom is superior to the home for learning or education. I tend to disagree with that "school" of thought! ;) ) "
I didn't get that feeling - I don't believe that a classroom is superior for the home for learning or education. I would see a kid who was not introduced to learning in a home environment at "school age" as redshirted as well. (For me, the debate between a b&M school, private or relgious school, homeschooling, unschooling etc. is a totally different choice).