This year generated a bonanza of speaker data. The online talk schedule was all interact-y and allowed attendees to plan and print their preferred talks ahead of time. During the conference itself the back of every room had a pile of poker chips and three buckets: Green, Yellow, and Red. The idea being that everyone drops a chip in the Good/Neutral/Bad bucket as they walk out at the end of each talk [hopefully they leave at the end].
Doug Knowns Data
If you were thinking the stats are weak and there are many ways to game the numbers you are very right and very wrong. Doug Napoleone loves data even more than I do so he's doing regressions like nobodies business. Doug has a post up explaining the raw data and the problems associated with turning the raw stuff into usable numbers. He does speech recognition software as his day job so he knowns statistics backwards and forwards.