The only Wash U residents I've seen who are D.O.'s are in their emergency medicine program or psychiatry. There are no D.O.'s in the medicine program or surgical program that I know of. There is one fellow who is an anesthesiologist, but doing a critical care fellowship, one in transplant surgery, and one in nephrology, me. Attendingwise, there is one in GI, one in trauma/critical care, and I think one in PM&R who is with orthopedics. That pretty much sums it up, I can count all of them with the ten fingers on my hands.
Personally, I've had a great time at WUSTL. Great cases, great research, once you get past some of the elitist crap 😉.