My personal school of thought on this one is that you didn't go into emergency medicine to learn to think like a surgeon or an internist. You go into emergency medicine to learn to think like an emergency physician, and that means you need to spend time working in the ED seeing and treating ED patients. Yeah, I'm doing cardiology this month, and I think the time I spend standing around in rounds with my hands stuck in my pockets while internal medicine types discuss whether to give statins or whether we need to check a fasting lipid panel is time I'll just never get back. I learn more cardiology in the ED where the pathology is acute than I do just watching these people on monitors on the floors and units. By the time you see them, the ED physicians have already worked them up and initiated the treatment, and that leaves you nothing to do on off-service rotations but clean up the details. You can make the argument that by rotating off-service, you learn from "experts in the fields", but I contend that I'm not going into that field, and I'd rather rotate in the ED, learning from the experts in MY field.
That's one of the big selling points of ECU, I think. It's got a fairly limited residency selection (EM, FP, IM, psych, general surgery, cards fellows, PM & R, OB/GYN, and that's about it). However, it's also the only hospital in this town, so you can't bypass it, and it covers everything basically between Raleigh and the ocean in Eastern North Carolina. There's an insane amount of pathology, as this place might lead the free world in renal disease and HIV per capita, and there's a good mix of residents and private attendings to call. I had an interview at one place whose name I won't mention because someone there will pop up and tell me it's not true as soon as I say it, but I heard on the trail that this place is so ridiculously specialized it even has male and female Foley teams to go around and put catheters in patients of respective genders. I say, no way. I did med school at a place with plastic surgery residents, and just about every facial lac, we called those guys on. Here, I've sewn up good-sized face lacs without a second thought, and I think I'm better for the experience.
I must also add that there's no radiology residency here, which eliminates the frustrating experience I had at my med school of radiology residents reading films at night, and then the ED gets calls each morning with the attendings' overreads, and you have to call the parents of the little kid you sent home a few hours ago to tell them, "We're sorry, but after further review, your son really DOES have a broken arm."