These are very nice high, relatively even scores. The one exception is Coding, which is a measure (among other things) of fine-motor speed. (Notably, the second lowest score is Block Design, which is also a timed hands-on task.) In some individuals, this may be suggestive of fine-motor difficulties. (I wouldn't say speed in general, as the other PSI task, Symbol Search, is a healthy High Average.) Does he have handwriting issues? Or is he just very careful and reflective?
I think he is just measured in how he does things. Fine motor has always seemed pretty good. I think he will need to take WISC-V in next couple of months as the 2 year period for his IV is up in February.
Is there a recommended regular testing schedule?