[dahart]

Are you suggesting that "cultural fit" and "interpersonal skills" are so well defined and bounded that they are completely distinct, and definitely do not overlap?

I remember hearing about a study that success in engineering graduate school is better predicted by the GRE writing scores than by the math scores. So could general communication ability be more important than engineering ability when it comes to job performance (on average, across all people & jobs)? Is it possible that both "cultural fit" and "interpersonal skills" are both trying to get at whether someone is a good communicator who emphasizes getting along with the people around them?