So, the Wechsler test he took was the WPPSI, right? I believe that the DYS requirement on the WPPSI is 150 for the composite (full scale IQ) score, so his current scores won't do it. His WJ achievement scores should be in the 99.9th, though, so those will probably meet the achievement score part. Perhaps you can retest him on an IQ test in a year when he would be age eligible for DYS.
The score requirement on the older child version of the Wechsler scale (WISC-IV) is 145 rather than 150. I can't recall the youngest age at which he could be tested on the WISC, but it might be 6. The SB-5, which is another test they take, he could take even now.
