Without jumping to too many conclusions it seems logical to me that the number of students with >520s stays roughly constant year to year. With the majority of T20s median MCATs climbing a point or two, it seems like they're focusing more on elite scores than holistic admissions than they used to. Maybe this is a return to what it was like on the old MCAT scale. Perhaps the new scoring system only worked temporarily to de-emphasize the score to adcoms.