Thanks, everyone! The EG school has an actual gifted curriculum (compacted/accelerated/enriched), understands gifted needs and really seems to pride themselves on meeting those needs, but the Catholic school would more likely have him split his day. I'm not sure if he would have peers exactly at his level, but we live in one of those rare school districts where "40% are gifted" and you have to be 99+ to be eligible for the gifted program which is overwhelmed with the # of kids so it has not been too hard for him to find friends (on that note, how common are those 99.9 percentile kids in these districts? The public school didn't seem too impressed with his iq).