These scores are very strong. Here is his percentile rank (how he did against same age peers)
Broad Reading >99
Broad Math 99
Broad Written Language 99
Basically, given 100 same aged peers he would do better than 99 of them in math and written language. He does better than more than 99 of them in reading. It would also be interesting to see how he fares on the WJ cognitive - more of an IQ measure. I suspect you will see high scores there, too.
I agree with Cricket - I'd ask for the state law or district policy that says no acceleration before age 6.
