“It is not clear to me how they will transition to a structured world and meet the most basic requirements for reading, writing and math,” said Luis Huerta, a professor of public policy and education at Teachers College of Columbia University,Probably much faster and with more psychological stability than those "structured" kids will to a world that is, despite your assertion, not particularly structured. I think the sausage-factory citizens are worried about the abilities of the "unstructured."
I really don't think we should be fighting among ourselves about who is the best speller. Home schoolers and unschoolers bickering about who does a better job is just doing the enemy's work for them IMO.