Yeah, we see that in our district as well. My take on "older for grade" is probably skewed by the fact that I looked @ your ds' bd & saw that he was just a bit more than a year younger than my dd13, who is a 9th grader, but I must remind myself that she isn't in the "right" grade for age -- lol!
IMHO, he isn't just barely gifted b/c his VCI score is pretty darn HG+. What he is is uneven if those prior scores are a good read on his true ability. His EXPLORE scores are also very high especially if he hasn't been getting significant acceleration at school, which it sounds like is the case. I'd be wondering if the prior PRI is a bit low b/c his math performance was so strong.
