I think most small programs 2 or fewer reisdents/class tend to take primarily away rotators/fellows not just Mayo AZ, however mayo AZ especially isnt worth it unless you did a research fellowship with them. Sinai also as you said, but they are a big program just with tons of fellows that are essentially guaranteed a spot. UCLA also past years has also taken primarily research fellows. Programs that heavily favor away rotators tend to be NYC programs, especially cornell. Texas programs tend to primarily recruit from texas schools or away rotators with texas connections. USF primarily takes those with regional connections. CWRU usually takes home students and their own research fellows. Wouldnt even bother with the Larkin programs unless you have no other choice and can pay for a spot. Hopefully this is helpful, will try to add more if I think of any

i think this is all good info but if your mentor has connecs and advocates for u, can still get interview w/o rotating/RY

Texas programs will take Texans that went to medical school outside of the state (got interviews at every Texas school I applied to and did medical school in another state - am Texan)