While I agree that numbers do come into the initial screen for interviews, there are many other attributes, too. At our program, all applications are looked by at least two faculty who rank the overall application. Areas evaluated are board scores, grades, research experience, etc (there have been numerous topics on this). The program director then selects which to invite for an interview based on these results. We have interviewed people with 220's to >260 and all are considered equal once they interview.
There is also a regional preference, too - someone from California may not rank a Southern/Midwestern/Eastern program high if given the choice to stay in CA, and programs want to interview candidates who would actually want to spend 5 years with them, versus someone who is just applying to get an interview. A program wants to interview people who are truly interested in becoming part of their taem.
When deciding on where to apply and eventually interview, look at what you want in a residency - surgical volume, research opportunities, depth of field, fellowship vs private practice placement, close to home/spouses family, etc. Nearly all ENT residencies offer great training, just be sure you're happy with everything else.