I had my initial interview on a Monday, got a call on Tuesday for a secondary interview on that Wednesday, received a phone call on Thursday from HR to go over details of the position and on Friday of that week received a phone call from HR to offer me the position.
Each part of the process was well laid out and any question or concern during the process was immediately addressed. The courteous and efficient manner of the interviewing staff and the HR personnel is a direct reflection of the work environment you will encounter daily.