I spoke with a recruiter/talent manager at FB for a phone screen and it was a very casual and fluid conversation of myself and my experience. She said there would be a few more steps... a manager phone screen. if that goes well, then a timed online exercise testing my excel skills and finally a F2F group interview. My manager phone screen was OK but felt rushed... the hiring manager was 10 minutes late for a scheduled 30 min conversation.

Applied through a referral. Recruiter reached out to me almost immediately. First phone screen was simply introduction. Then had another phone screen with hiring manager - 30 minutes each. Scheduling was prompt and punctual. They expect you to be super excited about the role, without knowing much about it. Any doubt about it and you are OUT