I just got out of an interview today. Ahhh I think I bombed it. I was actually confuse when I walked out of the interview, not really knowing his response. He seem so emotionless and disinterest. There were several times in which he did say "Sounds good", "that sounds great", "that true", "thats is a very good experiene", "You probably have very good experience since you work with professor x", but I think he was just tricking me, trying to be nice lol. Then at the end he was like "we went fairly quickly, but thats all that I needed from you. you have very good academic record. good luck to you and with your research, maybe you can get to be a co-author". or maybe i'm just a little to self critical.