Some interviewers weren't too bad, and mostly stuck to the, "where do you think you went wrong with MCAT preparation?" line (like PBand, I also took the MCAT twice and only improved by one point). A few others took it a step farther and insinuated that my low score would translate to a weak medical school performance. Only one interviewer got somewhat mean about it - he was the one who informed me that I had the lowest MCAT score of anyone the combined program had chosen to interview, and he told me that he felt like interviewing me was a waste of his time.
At the end of the day though, you have one hand to work with and you deal with it. One way or another, everything works out.
On a tangential note, I currently teach MCAT bio for one of the test prep companies in Portland. After a year in medical school, it was easy to knock the MCAT material out of the water.