Here's a question: Is Picasso a 10x artist? The thing about the 10x claim is that it takes something complex and creative and applies a scalar multiplier to it. Talking about 10x programmers is _semantically_ problematic.
It's telling that there's no such thing as industry talent matrix. Instead of general skills - creativity, accuracy, speed, debugging insight, ability to learn new languages/frameworks, team leadership, good-to-have-around vs toxic asshole, and so on - we have this myth of "the rockstar".
A certain kind of management loves because rockstars because having them around reflects well on management (reason number one for hiring them) and supposedly they are super-productive (reason number two, which often turns out not to be true in practice, especially in a team setting.)
The hiring process tests for almost none of the qualities on the talent matrix. There's a ridiculous notion that knowing algos makes you a developer worth talking to, and a slightly less ridiculous notion that a bit of hazing tells you something about how well someone works under pressure.
The bottom line: that after all these decades we have far too little research defining the qualities that really matter in different work contexts, and almost no research at all into how to select for them.