I applied through university. The process took 4 weeks. I interviewed at RSM (Boston, MA) in Feb 2013
Interview
Applied on campus and received an invitation for an interview after a few weeks. The recruiter was VERY social and nice. She started off asking me about myself and from there we talked about my likes, why I picked accounting, why I picked the school I did, etc. Then we talked about the company more and what kinds of social things they do. It seems like a great company from what she told me. It seemed very much like a conversation and she didn't ask weird behavioral questions like weaknesses or any of those "name a time when....." questions.
I applied through an employee referral. The process took 4 weeks. I interviewed at RSM in May 2014
Interview
I got referred through a current employee and had a phone interview with the recruiter. We set a time before hand that worked best for both of us and the recruiter called me during that time. The interview was very casual, basically the recruiter wanted to know which way I was headed in accounting. If I was thinking about doing tex or auditing etc.