I'd actually argue that of the LA programs, UCLA RR-OV encourages/trains the most when it comes to efficiency, since UCLA RR is very invested in efficiency, esp given how physically small the ED is compared to the rest of the hospital. Because UCLA residents work in a county shop, academic shop, and community shop, they get a good sense of how to practice in all settings, and UCLA residents have that reputation when out working. County, by nature of county, is harder to learn efficiency in.
On the note of county - Olive View, of the county programs in LA, has less consultants and resources and often times has to transfer patients (once they're been dispo'ed and treated appropriately by the ED) to other county/academic hospitals, what you'd see more in community/rural shops, so OV is great training in that way.
At UCLA - RR - Patients are sick, and medically complex, and you get great teaching from very experienced faculty who are leaders in education in their field, and fantastic consultants who are also leaders in their field. Yes, you consult other services, but it's not because you're punting, but because you're needing to dispo your patients to them. Also, wouldn't you want to learn from leaders in their field so that you know how to manage these type of patients when they fall in your lap and you don't have the experts? Residency is the time to learn how to do it. Our job is to learn how to become great resusitationists, and that isn't taken away by consulting services when you're done fixing the patient to get them dispo'ed. The off service rotations at UCLA-RR are fantastic for learning as well, and are great training for the interns/2nd years.
Having the plurality of training sites develops very well rounded physicians who thrive in a variety of settings, which actually matters more than you'd expect as a resident.
You also get great access to mentors in pretty much every field of EM, and if they don't have faculty here with it, faculty are happy to connect you with someone who is. Because of how old the program is, there is a long list of alumni who are always happy to help. Here's an example of the great things the program and alumni are doing in their recent newsleter:
https://www.emergencymedicine.ucla.edu/sites/default/files/newsletters/EM_Newsletter_Spring_2020.pdf
I'm disappointed in the toxicity of this thread.