[mturmon]

Insightful.

"Bad fit for particular job" != "poor candidate in general"

Sometimes the interviewer can see this better than the candidate.

[B-Con]

And note that one of the companies mentioned by the OP (Google) is very up-front about screening for "culture fit".

Sometimes people get hired and then get very unhappy with their "fit" in the company or the way things are done. Some people leave within 3 months. It's nice when they screen to avoid that.