They seem to self-select into prominent academic positions (of course I deal with academic folks, not folks with "straight jobs" -- likely there are such people everywhere). I am not sure how rare the ability is, because I think most people do not work up to their genetic limits -- usually acrasia gets them first. Academics often have an easier acrasia problem because (a) their work is interesting/rewarding and (b) collaborators/deadlines help get across motivation lulls.

People in startups are another example. Motivated startup people, especially single digit employees, often work long hours and intensely and productively.