I remember there was one school that gave a super generic mission statement and asked you to reflect on it (maybe U Chicago?). It wasn't super long, but I just thought it was a ridiculous essay question, and there's almost no way to write something that doesn't sound dumb. Wow, you believe in treating the whole patient and in educating the next generation of healers? FASCINATING! I've never heard that before! Let me write 2 pages about it.
Duke was a beast, but they really care about the essays, which I appreciate. If I'm gonna put that much effort, it better count for something.
UCSD was looooong.
Georgetown was hard because it's really hard to write 2 pages on a school you don't know that well. It's probably great if it's your first choice cause you get to write them a love letter. Otherwise you're really just going with what's on the website, and that's lame.
Vandy is long as hell, but you only get the secondary if you get an interview, so at least you know it counts for something.