Its a subjective definition. You have a different one to the author. sneak has a different definition to you.
That's a part of the problem: there's no clear definition and the label "10x developer" means different things to different things.
Some of these definitions definitely are a myth. Some are not. But the conversations about it tend to not be that meaningful, because everyone argues their own definition, which may or may not match up with other people who are also arguing theirs. The best we can do is define our definition and then state our reasoning about it and then others can agree or disagree or say yes but if you define it this way that I do, then its different because whatever.
Right now, everyone has a different definition and the discussion isn't that useful.
