I applied through college or university. The process took 1 day. I interviewed at Wayfair in Oct 2016
Interview
The interview was with someone from HR, and she asked some standard screening questions (e.g. if given the internship, would you come back to work here? What are you looking for in an internship experience? etc.) but mostly talked about the company itself. Overall, okay experience, and the interview was ~30 mins long.