You'd expect people who are much more productive than average, if they exist, to be relatively rare. So it's understandably not necessarily easy to round up a p

You'd expect people who are much more productive than average, if they exist, to be relatively rare. So it's understandably not necessarily easy to round up a population of them and do a comparative study. But even without a study, some people seem noticeably hyper-productive, beyond noise or luck. I like to work on personal projects, but if you tried to compare my productivity to your local Fabrice Bellard-class programmer however you want to measure it, I'll have to admit the ratio's probably pretty far from 1x.