There’s no one programmer who does the work of ten other programmers. One uber-programmer does just as much work as one ordinary programmer. It’s just that the results solve ten times as many problems. Programming is fundamentally a design problem. A great bridge designer doesn’t do the work of ten lousy bridge designers; the great one designs one great bridge in the time it takes the ten lousy ones to design ten lousy bridges.
The best approximation is that each problem has a certain complexity and a certain size. The size determines how long it will take, and it doesn’t matter how good the developers are. The complexity determines how good a developer is needed to make progress at all. If you’ve got only easy problems, an uber-programmer doesn’t help you much (unless the programmer can find a smaller, harder problem that replaces the big easy one). If you’ve got a hard problem, ten average programmers will work on it forever without getting any results.
And there’s one last thing specific to computers: the computer can solve easy problems for you, but making it do so is a hard problem. But solving that one hard problem (plus some processor time) resolves a lot of easy problems. Another type of hard problem is writing a magic library function that makes a range of moderately hard problems easy enough for average programmers to solve.
If you’ve got ten people essentially doing data entry, an uber-programmer may be able to eliminate the need for them to do that at all. If you’ve got ten developers working on some problem, an uber-programmer may be able to double their productivity. In either of these cases, the uber-programmer directly produces something that isn’t part of the actual project, but the benefit to the project is on the order of ten average programmers’ work. And, if the uber-programmer reduces the complexity of the problem to put it in reach of the rest of the team, no amount of ordinary programmers’ work would benefit the project as much as the uber-programmer’s contribution. Of course, if you require an uber-programmer to literally do the work of average programmers, there’s no benefit at all.