PT conference this year with our DS6 in 1st took a little more than listening. Particularly in that the first thing the teacher wanted to do was show us how well he passed the standard incoming measures like "He did really well counting to 120." Yawn. Can't remember how old he was when he figured out counting to no end (3?)

I'd look to skip the polite preamble and try convey his positive reactions to above level materials when he is at home. Especially representing where he currently seems to be learning at or skills he is working on mastering. Like "We've noticed recently he doesn't skip words anymore when reading Magic Treehouse to us at home." or "He found some multiplication work online and was really excited to try it; it was great to see his passion for learning fire up."