Very slow in my experience. Recruiter will call you, then hiring manager, then super day, then possible meeting with director or VP, each a week apart. The super day included 4 senior managers, all mostly asking the same questions about team work and direct fit type of questions.

One phone screen by HR One phone interview with hiring manager One interview day with 6 members of management team over 7 hours at the Atlanta HQ. I received a call one week later saying the director would like to see me. Another week after that, I got a call telling me I got the job.