UM, that gap doesn't seem to dramatically improve until adolescence. DD's writing lagged her other literature skills until very recently. Truth be told, she still only writes like a gifted 11th or 12th grader, and not the way that she reads and can discuss literature.

It's not really very easy to accommodate that in a standard curriculum. Charlotte Mason methods work much better than most public school pedagogy with this particular asynchrony.

Schrödinger's cat walks into a bar. And doesn't.