[rootsofallevil]

>There will be false positives, but the rate is low

What do you base this on?

My experience is that if you are perceived to be good you can get away with being a low performer for a lot longer than if you are not perceived to be good, I have seen it quite a few times.

[hwbehrens]

Wouldn't that be a false negative?

A false positive would be when a high-performer is perceived as being a low-performer, and terminated for that reason despite their superior productivity.

I can certainly imagine this occurring, especially to employees who are socially deficient, but then you start to get into the quagmire of politically- and socially-motivated terminations, which I think is outside the scope of this discussion.

[hintymad]

You're right. Edited the comment accordingly. Both false positives and false negatives exist.