The only "10x" developer I have worked with taught me not only a ton about agile teams, but also about the liberal use of interpersonal skills in advancement of that goal. We routinely worked with education administrators (former teachers) who all had classroom experience and professional interpersonal skills training.

It was amazing to work with people you could simply expect respect from, even when everyone was well aware of the simmering annoyance and disagreement available below the surface. You just can't build the kind of momentum we saw with people who many any team member feel unsafe in their role.