That has not been my experience at all with "10x" programmers. I have often run into the first type from the parent comment - "hyper-productive" people who churn out huge amounts of code without a lot of thought. They tend to leave side effects all over the codebase, and often have someone in management who sponsors them (hoping to ride to promotions as a pair) who forces other teams to carry the burden of cleanup. However, if you run a startup, this kind of person really is an amazing asset, because there isn't a lot of codebase to clean up.

People I have met in the the third type (true 10x-ers who know it) seem to have a lot more humility, in my experience, than suggested here. If you look solely at metrics like kLOC/year, they are often in the middle or bottom of the pack. They are not usually generalists, instead specializing in some area that is of high value.