Yes, schmoozers do prosper

An excellent article from US News & World Report discusses the value of "schmoozing" and in particular avoiding negativity and getting along with other people.
Whether you are in an interviewing process or currently employed, being able to work with people is the entry fee for landing the job and advancing in your career. If you don't have that basic attribute, especially as you move into more senior positions, whatever else you may possess, is usually little valued.

Do Not Criticize, Condemn or Complain

After many years in corporate life I've interviewed dozens of people for all kinds of jobs from individual contributor to Vice President. In that time I've learned that one of the surest ways to blow an interview is to ignore Dale Carnegie’s advice from his book How to Win Friends & Influence People: “Do Not Criticize, Condemn, or Complain.”

Regardless of how big a jerk your boss was, how dumb your co-workers were or how badly your current or former company was run, the only impression you will make is a bad one if you resort to whining, complaining or, even worse, story-telling.

No employer wants to bring a negative attitude into the workplace. Not only that, an interviewer’s reaction to complaining and negativity is nearly always to assume the complainer was at least partly if not entirely at fault in bad relationships.

But worst of all, if the interviewer is your potential new boss, he will be saying to himself: “if he says this about his current boss, what will he say about me?”!!!