I was given an unexpected phone screening / interview two weeks after I applied for the job. Then I was called a week later to set up an interview that was two weeks from that date.
The interview was very relaxed and we just went over my resume, and we talked about the position more. They would ask me some behavioral questions that arose during me going over my resume. They joked a little and smiled a lot, and were very friendly. They didn't ask me any technical questions.
The interview was on a Thursday, and I got the offer on the next Monday.