DOsDad-
Wow man I wish my dad surfed the net for me and did all that cool stuff.
Here's the deal. If he wants to get into any DO EM residency, he's a shoo-in. Assuming he did reasonably well the first two years, and assuming he'll do okay on his 3rd year rotations, then he should have no trouble whatsoever getting a DO EM residency... they aren't too competitive at all...
I will warn you that he should most definately inquire as to the accredidation status as well as financial backing, as one DO EM residency a few months ago shut down (and their residents had to find other spots)... rumors are another one is about to as well..
For MD EM spots, DOs CAN get into them. Its tough but manageable. I myself had 20+ interviews, there is another user on this site who is a DO in an OH MD residency, and a friend I met on a rotation is a DO from Touro who had many more interviews at even better places than I did. Granted, she took the USMLE, though...
My opinion is that he do a rotation at an MD facility, if he is planning on applying to MD residencies. It will help level the playing field (as we are underdogs) in regards to the ERAS application. Also, make sure he sends in his ERAS at the earliest possible date, even if he only has one or two letters of rec in...
Q