I have a white male friend at Harvard Medical School. He and I went to Yale undergrad -- he had about a 3.9 GPA, but a 30 (10, 10, 10) on the MCAT. He did have extensive extracurriculars, and is an all around awesome person (he's going to make a FABULOUS doctor), but his MCAT was nothing to write home about.
If I were you, I wouldn't retake your MCAT -- unless one section is significantly lower than the others -- or if you absolutely know you can improve 3-4 points. Otherwise, it's just a lot of needless stress.
I took the MCAT in August and have an interview with NYU (three days after my application was complete) -- and I got a 32S. Granted, an interview is VERY different from an acceptance, but it's a start at least.
I know someone at Mount Sinai with a 43; I know someone at Columbia with a 28.
Sad to say -- or, perhaps good to say ! -- it's a crap shoot a lot of the times.