Price's square root law states that half of the literature on a subject will be contributed by the square root of the total number of authors publishing in that area.
It seems to play out well in the teams I've been with too. If you have 9 people on your team, 3 will be responsible for half the work. If you have 25 people, then 5 will be carrying half the weight.
Extrapolated out, on a team of 100 people, 10 will do half of the work. That would mean 1 of those 10 will be doing 5% of the total project while 1 of the remaining 90 will be doing 0.5% of the total project.
Thus, I believe you can say that 10x developers exist, but only at the large team scale.
It seems to play out well in the teams I've been with too. If you have 9 people on your team, 3 will be responsible for half the work. If you have 25 people, then 5 will be carrying half the weight.
Extrapolated out, on a team of 100 people, 10 will do half of the work. That would mean 1 of those 10 will be doing 5% of the total project while 1 of the remaining 90 will be doing 0.5% of the total project.
Thus, I believe you can say that 10x developers exist, but only at the large team scale.