Vanderbilt-- letter, typed, not too personal.
Maryland-- letter, typed, nice, some personal elements. Also an email from Medicine.
Hey, how do you go about calling a PD? Do you just say, "Hi, I'm so and so, I liked your program and just wanted to let you know I will be ranking you highly"?
At GW, they actually filled the evaluations out in front of me. AND, then they put them in a file, and you carry it around with you and hand it to your next interviewer. SO, I know I probably wasn't supposed to... but I took a peek in it (Bad!!). It had a number scoring system from 0-5, and places for comments. They made no secret of hiding it. Same with at BU-- the guy filled it out in front of me. I definitely think we are ranked by interview group before you walk in the door, and they pay special attention to ones theyre particularly interested in. At the end of each interview day they meet again and reorganize the list. I was at Mayo and they were waiting until everyone left so they could do that.