I will say there's more than a grain of truth to this. I retook (original: v8 p9 b8 and something awful for essays) and upped my scores to 11 8 10 R, but i think in a case when you already are scoring well they know you can tackle the MCAT and that isn't the issue. I agree re bolstering your GPA (and, since you're smart and probably just weren't diligent re classes, it'll be easier than retaking the MCAT a million times). Btw, is 3.0 your science gpa or overall? This matters as well.