[Bucephalus355]

The nicer they are in the interview the more that tends to indicate you will not receive an offer.

I used to wonder why this was, but kept seeing these types of anecdotes pop up again and again.

The best conclusion I have come to, which makes some sense, is that when you do well in an interview yet also some factor means you won't be moving on...the interviewer out of guilt feels compelled to be extra nice to you.