That wasn't the experience in the article:

> A four year old with a 3rd grade reading ability learns about a WHOLE lot more -- it opened up politics for her. She would read our junk mail, and learn who our council member was, who our representative is, the mayor, current events, history, etc. I know it's stupid of me to say, but I underestimated the effect that reading early would have on her breadth of learning.