Sounds to me that those scores are off. I don't believe a kid who can read at age 2 is just a high achiever. My son is DYS and way above the DYS IQ cutoff and he didn't read until 2 1/2, to put help put your son in perspective. He also was doing 2nd-3rd grade work in preschool. So your son sounds similar to my PG son. I think you should wait a couple years and have him tested with the WISC or something that's not in the process of being renormed. If I were you I would completely ignore those results.