Holy crap, I have a child that age in my daycare and he can't even speak clearly so when he sings the ABC's I don't even know for sure if he's saying them right, I'm just hoping. You have a little genius on your hands. I had a little girl that age with the academic abilities which was a good thing because she hadn't turned 4 yet when she started JK and she did fine. All children are different and we all have our own strengths and weaknesses. Just be proud of each child for their own special talents and don't worry.