Illiteracy rates of Native Born was higher in the South only by adding the immigrants (which was a trivial part of the South's population) can you beat down its rate to near equality to the North. Some Northern states had near 100% rates among its younger people while none of the South did.
I haven't particularly been concerned about the pre-Revolutionary comparision because the problems had not surfaced yet and most Southern leaders were trying to figure out how to end Slavery while those of a century later were pressing every nerve defending it and trying to assure its survival.
Virginia's wealth and cultural history gave it a lot of capital to expend and the nature of its slave system made it an exception in many cases.
...none of which is substantiated in anything you have posted here given the complete absence of any source, citation, or reference of any form.