Earlier quoted context omitted.
Sure, correlates highly, but not perfectly. Some people just don't get along. It's a fact of life. Managers are humans, and they detest working every day with people who rub them the wrong way. Couple that with upper management at Netflix pressuring managers to hit firing quotas, and you can be sure who is chosen to be sacrificed on the altar of that particular metric...
Further, to that point, any manager that dislikes a report is likely going to have a very difficult time getting quality work out of that report regardless of how talented they may be. Ergo, the report's performance may be suffering, but entirely because they're being poorly managed.
A pattern I've seen when relationship between employee and superior goes south is similar to disfavored step-child:
They get less praise for doing well, and more blame for any mistake.
This tends to escalate over time, and very often the employee's performance will degrade (since they won't get any credit anyway) which escalates the situation.
Often they "patch things up" a few times, but if they really aren't compatible, it's just a tenuous forced balance that will eventually break and plunge the relationship to even deeper depths.
Of course in this situation, all performance reviews for the employee are anywhere from slightly to heavily distorted in their disfavor.
This will always result in one of them eventually leaving the team, typically the employee.