That is absolutely NOT what I am saying. I don't know where you picked up on me saying that I think applicants from New England are superior to applicants from the rest of the country. That's just not true.
Don't equate "self-selecting" with "competitive"- Self-selecting includes taking into account many other factors, including state of residency, which is very important in the case of public schools like UConn.
The reason I said "1300 applications from ~6 states" is that UConn is the only public dental school in New England, and they give preference to the six New England states over the rest of the country. Sure, you have applicants from other states, but these are much fewer/rarer than New England and CT applicants.
Look at it like this:
Imagine you have a 3.6 GPA and a 21DAT, and you're from the state of Florida, or any one of the other 43 states outside New England.
Do you think you have a better shot at UConn or at Case?
From UConn's own website: "Typically 50-60% of each class is composed of Connecticut residents, with another 30% from other New England States and the remaining students from other states."
THAT'S why I said the applicant pool is more self-selecting. In an environment where you need to pay upwards of $100 for each application, including secondary fees, it is just more cost-effective to not apply to a state school like UConn if you are outside of New England (unless you have super amazing stats).
And since you want to talk in overall terms, I'll gladly make a bet that if UConn DID treat all OOS applicants equally (same preference whether you're from RI/ME/NH/VT or from OH/FL/CA), more people would apply to UConn, and it would definitely be harder to get into than Case.