The gifted support teacher at our elem school has told us he'd support a full-grade skip for our oldest DS, who is MG, on the older end of his grade, and physically huge (5'6" at 10 yo). We aren't interested at the moment. Although he could be doing harder work, he's generally doing fine as we live in a high-achieving school district (more than 10% of class in gifted support, based solely on 98%+ IQ scores) and teachers are generally good about enrichment.

Honestly, the main reason we aren't interested is that we each have several friends who were grade-skipped as kids and each one of them says they wish they hadn't been. Sure, that was 20+ years ago, but it still resonates with me. And frankly, DS is MG, not PG, in which case the discussion could be totally different. I don't know if we're doing him a disservice, but it's what seems right at the moment.