How is early reading related to nonverbal IQ (if at all)? He started reading at 2.5 (self taught) and was reading at solid second grade level before turning four. In theory he may have a higher verbal IQ - right? I apologize for all the questions, I am just beginning to figure all of this out!

I was planning to have him privately tested after he turns five and this is certainly giving me support that it may be worth the cost.