I don't believe for a second that actual 10x developers behave this way, because there's nothing 10x about this behaviour. A real 10x developer would be someone

I don't believe for a second that actual 10x developers behave this way, because there's nothing 10x about this behaviour. A real 10x developer would be someone who enables their fellow team members to be 2x developers. Or who creates a solution which is twice as X, twice as Y and 2.5x more Z — for any useful metrics X, Y and Z — than an acceptable solution. Basically their impact is 10x, not in terms of code or features, but in terms of value created in aggregate.