> Maybe she's just a lazy cow
Why not "Maybe he's just a lazy cow"?
Your biases are showing.
> Besides, the examples you cite absolutely can be bullying if they're being applied to somebody who is doing perfectly acceptable work and isn't any less productive than their colleagues.
You are of course correct, but we shall never know if the situations reported by the respondents to the survey were one sort or the other. It is not reporting on actually substantive situations of bullying, just what people "feel" and they are not necessarily the same thing.
These things are very difficult to measure, but we would expect a reasonable minimum of structure and control to a survey of this kind. Certainly I would ask the respondents to categorise their bullying and, where they were willing, to at least describe the situation(s) so that we could at least control for perception individual perception, if anonymity could be assured.
Being "taken to task" could absolutely be perceived as bullying when it is actually no such thing.