Not sure what that proves.
> considered a 10x developer
The 10x developer never existed. You're telling me these people are doing a year's worth of work in 1.2 months? Seriously?! 10x?! In a year you can probably learn to program from scratch and participle if you're working 8hrs per day 5 days a weekWe need to stop exaggerating so much. A 2x dev would be insane! A 1.5x dev does a year's work in 8. A 1.1x dev does it in 11. Saving a whole month itself is a massive amount of money saving. Our "10x" devs are really 1.1x and I'm not sure why we see that as anything less than wildly impressive.
Can we stop exaggerating so much?
Even assuming that maybe the average developer could come to learn how to solve the problem you can easily see the gap between taking months to learn how to solve a problem versus already knowing how to solve it on short notice being over 10x.
Large productivity differences are mostly a function of differences in capability than differences of speed in solving rote problems easily within their capabilitys.