Some random facts thrown out included 800 interview spots for the 300ish spots, greater IS bias, around 70% post II acceptance (not sure how that can be true unless they send out twice as many acceptances as there are spots), they seem to have slight bias for higher stats, but also saw people saying bias for health care experience.
General rule of thumb regarding acceptances is that schools send out 2x - 2.5x the number of spots they to account for withdrawals and other movement. Pretty sure that applies to both MD and DO schools.