The Consensus T14 Law Schools are at:
Yale, Harvard, Stanford, NYU, Columbia, Chicago, Michigan, Berkeley, UVA, UPenn, Duke, Northwestern, Cornell, GULC
As a Virginian, I can tell you for sure that UVA law is essentially a private school, because it doesn't take state funding which is instead drawn to the undergrad program. UVA-Darden is also like the law school in this regard. Michigan and Berkeley are prob like this too given that the law schools are nationally elite.
A JD/MBA or MBA/JD depending on how you want to think about it looks like a pretty damn good deal considering that every law school here has a good business school too, though some business schools' reputations aren't quite as hot as the law schools (Georgetown, Yale only because the Law School is so elite) and vice versa with UPenn being the biggest culprit here because of Wharton's reputation.
I would say that law schools are very numbers driven because of these factors:
1. There are only 200 law schools in the US and nearly the entire LSAT pool (minus the Canadian Law applicants) apply to these 200 schools. The entire GMAT test takers' pool spans a lot more schools and therefore, the super high GPA guys are spread out more internationally at least among Americans.
2. Most law schools enroll students right out of college and students who are typically no older than 25 (two or three years out of college). Students entering in their late 20's are likely the bridge between the young'uns right out of college and the outlier older folks. Note that Northwestern is an exception to this but it doesn't seem to be this way at most schools.
3. Law is a totally new profession for everyone who gets in law school. Even if you were a paralegal or legal secretary before school, you will prob still have to change your way of thinking in class, at least from my friends who went to law school, and there were plenty.
Please feel free to correct me if I'm totally wrong