I applied through university. The process took 2 weeks. I interviewed at Acquity Group (Chicago, IL) in Oct 2010
Interview
First round was a case interview for about 30 minutes on campus. HR called 2 days later for second round in chicago office. My process took longer because I had to wait for another set of dates. Second round consisted of 2 behavioral, 1 case, 1 writing assessment, 1 meet and greet with an associate. They made sure to have alum from your school. Total time for second round was 3.5 hours which included lunch where top management was available for questions. found out week later. they were looking for stronger IT background.
Applied online. Contacted by phone. First phone screening then a call to onsite. 1 hour coding test followed by 1 on 1 interview with manager and new hire associate.
I applied through university. I interviewed at Acquity Group
Interview
After speaking at a career fair and formally applying through school's career site, I was asked to sign up for an on-campus interview slot. The interview was deemed a "case interview" but was very general and a very top-down view. It was quite simple but be familiar with the work the company does.