>...I don't think at that point we are looking at special needs... What is the societal loss incurred because of, say, the worst 1% of your hypothetical top 10

>...I don't think at that point we are looking at special needs... What is the societal loss incurred because of, say, the worst 1% of your hypothetical top 10% (i.e. just the 90th quantile) getting bored/discouraged/checking out before middle school? Are those kids precocious? No. Are we disproportionately better off if the 90th quantile thrives? Yes.