Probably, but it is still a good school. It likely has such a high average because all the super-scorers are allured by the possibility of a full-tuition (merit-based) scholarship. None of the other elite schools offer anything besides need-based awards, but WashU can't compete with most of them with respect to location. Thus the perceived need for merit-base aid. (Interestingly, many of the big name schools condemn WashU specifically for this practice. For those obsessed with rankings, though, the results cannot be argued. WashU has been racing up the polls for several years running.) Also remember that not everyone who is accepted enrolls at WashU. The average MCAT is pulled up by all of the 40+ people who are accepted, but many of them may go elsewhere if they don't receive the aforementioned scholarship. The 36.6 avg may therefore not be reflective of the actual (matriculated) student body.
P.S. I know someone who scored 28 and interviewed at WashU. The "congratulations on your MCAT performance, we hope you will consider WashU" brochure seems to indicate, however, that WashU does love stats. I actually recieved this letter after my AMCAS data had already been transmitted.
