Even 'super smart' doesn't account for the fact that motor and language skills have nothing to do with how high the child's IQ is rated. I will fully give them that writing a young child is hard, and writing one that's very 'smart' but can't speak or write would be even more difficult. But when they have an artist drawing her as somewhere between the ages of 6-8 it makes it look like they just don't want to even try.
This is ignoring the fact that Franklin is not acting or looking like a child of 11-13 because that a different kettle of fish.</s>