The process took 2 weeks. I interviewed at McKinsey & Company in Jun 2010
Interview
3 hour interview. 1 hour very fast-paced problem solving test. 2 hour-long interviews, each involving a standard case and "experience" interview. the mckinsey website is very helpful with regard to the experience portion--check out their video.
Interview questions [1]
Question 1
What was a time when you worked with difficult people and were challenged in the process?