I do know that medical schools have been trying to attract individuals with other backgrounds -- was recruited myself, and admissions committee members told me one reason is that doctors have the impression they may have screwed themselves by being monoculturally ignorant of economic forces, technology, etc. So they're encouraging people who aren't from the traditional biological sciences backgrounds.
I'd expect the med school literature courses to have about as much effect as med school statistics courses, though -- little to none. Plus, there's been interest in shortening med school.