I’m afraid this seems to be the case, in so far as you can actually prove such things – see here:
The researchers analyzed data collected over nearly 20 years from three different surveys, which sampled roughly 10,000 workers comprising a wide range of professions, salaries and ages. (The three surveys measured the notion of “agreeableness” in different ways.) They also conducted a separate study of 460 business students who were asked to act as human-resource managers for a fictional company and presented with short descriptions for candidates for a consultant position. Men who were described as highly agreeable were less likely to get the job.
I can see it now – a new commercial opportunity, workshops on how to be mean!
Picture credit here.