I looked up some literature on this, and found this abstract:
"Applicant sex, applicant physical attractiveness, type of rater (120 students and 105 professional employment interviewers) and the type of job were manipulated experimentally in a 2 times 2 × 2 times 2 design. Physical attractiveness of job candidates had the broadest influence on employment decisions. There was no main effect for applicant sex, but professional interviewers were biased in favour of female applicants while student raters were not. Also, as expected, professional interviewers rated job applicants less leniently than students did."
Also this tidbit from the discussion interested me:
"Student raters were particularly lenient when rating male applicants, and recruiters gave much lower ratings to the same male applicants while rating female applicants more positively than the male applicants"
So it depends on who's interviewing you and what sex you are. Now, even if med school interviews are not job interviews, I doubt everyone on the admissions committees are free from such cognitive biases.
GILMORE, D. C., BEEHR, T. A. and LOVE, K. G. (1986), Effects of applicant sex, applicant physical attractiveness, type of rater and type of job on interview decisions
*. Journal of Occupational Psychology, 59: 103–109. doi:10.1111/j.2044-8325.1986.tb00217.x