On another note, I bumped into a parent whose kid is on the wait list a few weeks ago, and he told me that their understanding is that when it comes time to take kids off the list, they have a sort of round robin/draft pick arrangement, where each regional adcom gets to pick a kid in turn. He said that his kid's adcom had told him that he was at the top of his list.
(This is what I actually came here to post, before I was distracted by the FA thing!

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