I can believe racism was a factor.<p>However, there's also a bias against <i>new</i> guests (with no history).<p>And, there seems to have been a big increase in the percentage of marginal listings that are not-really-available. (Perhaps, far more people are casually listing places without real intent to rent or diligence in checking requests and updating calendar availability. Or perhaps with higher usage, those are the only kinds of listings that are left in the last few days.)<p>My experience: the first few times I used AirBnb, even as a last-minute booking, availability was accurate, most hosts got back to me right away, booking was quick and easy.<p>The last few times I've used AirBnb, in New York, Berlin, and Portland, I've had a positive feedback history and there are more listings showing as available than ever. <i>But,</i> many hosts take over a day to respond if at all, and often then tell me the spot isn't available. I've had to send ~10+ inquiries, instead of ~2, to achieve one booking. So a few 'sorrys' in a row, on a booking a few days in advance, doesn't seem <i>that</i> suspicious.<p>Because the host gets to perform a 'social/internet x-ray' on a prospective guest, you always wonder if the real reason for the 'sorry' is that you're just not to their liking: by race, gender, age, coolness, politics, career, whatever. You never know for sure. That's both a strength and weakness of the AirBnb system: people can meet and host others they're most comfortable or interested in... or express longstanding and unfair prejudicies.