Just to add a data point - I interviewed with AirBnB in January 2014 and had a very similar experience. I was referred by a college classmate and close friend

Just to add a data point - I interviewed with AirBnB in January 2014 and had a very similar experience. I was referred by a college classmate and close friend who used to work there at the time, who knows me extremely well, and is easily in the top 1% of engineers I know (Linux contributor, loved by every employer he's ever had, etc.). He told me I totally had the level to work there, and was better than most people he worked with. So I went along with it, and went to their holiday parties, where one of their execs schmoozed with me for a while, told me I sounded like a great fit, and a recruiter would be in touch with me. I talk to the recruiter on the phone, get assigned a home coding challenge. I spend a Saturday on it, and get a perfect score on it. I don't know if it was by design or not, but it showed me the rankings of every person who ever did that challenge. I was tied for 1st place with 40 or so other past candidates, in a pool of a few thousand participants. I do their onsite interviews (fortunately I was local to SF) - don't remember much, except that they felt very stilted. But it was the usual "here's a canned problem I know the best answer to, you have 40 minutes to figure it out while I give out cryptic clues". After 3 or 4 of them, I sit in the room alone for about 30 minutes - the recruiter then comes to me and tells me that they won't move forward, bye bye. My friend met me outside for a smoke, and told me he had no clue what happened. Oh well. AirBnB definitely left a bitter taste in my mouth, but I got a much better gig at a much better company a few months later, so things worked out.