Originally Posted by serenade
Well, success on the mcat = usually correlated with success on boards = success in getting a D.O = success in being allowed to practice medicine. So yah, generally your mcat score or even USMLE may not be predictive of how good a doctor you'll be, but a low mcat score will be a decent predictor of performance in medical school and the boards and statistically the drop out rate for lower mcat score is high.
success on the mcat is strongly correlated with success on usmle/comlex. that's all we can say.