That's surprising that his working memory score didn't come out higher given what you are saying about his auditory memory.

What you are saying about his advancement in math would make sense given his PRI scores since I understand that one correlates reasonably well with math aptitude. In re to the reading, it sounds like he is probably an older first grader who is reading at a 4th-5th grade level. Is that right? Kids who are not necessarily verbally gifted can certainly read a few grades above grade level, but his VCI could also be an underestimation.

His WIAT reading scores would point to a child with a great understanding of phonics (really good at decoding challenging words) but whose comprehension is fairly on par for age. Do you feel that his reading comprehension is significantly advanced as well?