I know families that allow children to gain skills at the time and pace the child desires and their children did not read until 9, and then read voraciously for years after that, above "grade level". I know of a family whose child was exposed to no formal math until their teen years and was able to easily master what would be considered *YEARS* of math in several short months. What if curiousity and developmental readiness matter way more than the mainstream thought leaves room for.
Maybe it's easier for me to see, with the children that I have been charged with, because they have *very* different timelines, capacities, learning styles, and interests. But Ethan is right where Ethan is supposed to be, Gavin is right where Gavin is supposed to be, Mikey is right where Mikey is supposed to be, and Seany....well he is never where he is supposed to be!