Mixed results. I am playing in a band I found through Craigslist last November. We get along pretty well and like the same music. We've played one gig and have been asked to play a local ale house by the owner who saw us at the first gig. So things are going well.
Before I found this band, I went on several auditions that I couldn't wait to leave, and one where the lead guitar left after two songs...and I trucked my kit 35 miles to audition for what I thought would last several hours. We ended up playing less time that it took me to set up my kit.
However, the other band members of my current band tell horror stories of auditioning drummers from Craigslist. Drummers with no dynamics (loud only, please), bad attitudes, less than stellar (or no) equipment, and/or no reliable transportation.
I may have gotten the drum chair because I was the easiest to get along with, and had the best attitude. I think there were actually drummers better than I technically, but they weren't too musical.
The best place to get real good gigs, at least here in SoCal is Musicians Contact Service. They used to be located on Santa Monica Blvd in Hollywood, but they're on line now and for a fee you can get access to professional level gigs and auditions.