Ouch....sorry, didn't mean to come across like that. I've just met too many people as an undergrad and as a medical student who talked themselves out of doing what they wanted to do because they heard it was too competitive, and then later I saw it wasn't that competitive at all. Case in point: Roommate in college started premed and changed due to "competitiveness," is now 29 and in a field he hates and planning to go back to medical or dental school. So I just try to dispel the myths before they get too far. (in my sarcastic and occasionally not very funny manner) I didn't mean to come across as discouraging questions. I'm sorry.
The point is this....I was not AOA. I interviewed at many of the "most competitive" programs in the country, both in terms of location and prestige and quality (all of which are different things in my opinion.) I got 28/30 interviews. I had a buddy ranked a few places above me in the class who was AOA who also got 28/30 interviews. In other respects our applications/numbers/letters etc were similar. There just aren't enough AOA applicants out there that a program can refuse to interview people who aren't AOA. Even presuming that all EM applicants came from the top half of the class (they don't) that would be 30% of the applicant pool carrying the letters AOA behind their name. Let's say maybe 1/4 of the applicant pool (300) applies to any particular program and that program only offers interviews to the 30% that is AOA. That's 90 applicants. 1/3 of them turn down the interview, so you're down to 60 applicants. Since most programs interview around 10 applicants per slot, that would have to be a very small program to be able to have such a competitive cut-off.