That was my reaction. I've heard of people being quizzed about their level of motivation, but that was more like a "are you sure you want to subject yourself to this?" kind of thing.
Until not too long ago the ocean/atmospheric science dept. at MIT had an attrition rate of 40%, but I think that was because they were MIT and had to be badass. The grad students got together and informed them that word was getting out and people didn't want to waste their life at a program like that. So it dropped to something more normal.
Thanks for the interesting corrective about LSATs, etc. I'll have to ping my friend about that -- I think he mostly liked telling the story.
-- Andy