It really depends which room. With Pandora you're at the mercy of their recommendations too, but they aren't really held accountable for bad recommendations. Sure there is an algorithm, but I would bet on people picking songs any day over an algorithm if anything were on the line. With Turntable.fm, you're playing for your reputation, and some people take that VERY seriously. Some of the bigger rooms I've been in have had incredible selection, especially the ones with DJ thresholds.