User blog comment:Paul.rea/Teen Wolf News 060214/@comment-5237598-20140602135010/@comment-4091815-20140602192723

I think the writers chose a good age - by age nine we're reading pretty well and understand most basic human speech.

Add to that the habit of television shows making their kids way smarter than real life kids and you've got a pretty solid basis for everything she's said on the show.