I've been there, done that. From drummers that came in with huge kits, talked a good game for an hour while setting them up, and then couldn't hold down a beat for their lives to guys that had great chops and bigger egos/attitudes. The best drummer audition we had took 10 seconds to decide. This guy came in, recommended by the wife of one guitarist as a "guy that someone knew where she worked". We were skeptical. The guy comes in, says he hasn't played in a few years, and proceeds to do a tasty run down on the toms, ending with an off-time high-hat "sip". I was sold. We went though the usual half hour of songs anyway. He was a great drummer, in the end. He stayed with us for the six months that the band was together.