My 2pworth: it would be different if your DS had at least some academic areas where he was close to age-typical (like writing for my DS) but if I understand you correctly that he doesn't, then I think it's only worth considering school for him if the school would be prepared to be extremely flexible and give him very radical acceleration (both!). At this age I find it hard to imagine doing school really *just* for PE and break working well, though YMMV. Since you're really rather unlikely to find this, I think you should look at school options from the position that your default is to home educate (and do non-academic things to give him friends of his own age), but that you would be delighted and surprised to find a better option. Have you read what Terry Tao's parents have written about his school experience? If not, do google it - it was amazing.
