Another timeline for expedited Passport Book / Card:

5/4 Mailed Priority Mail Express from CA
5/6 Arrived in PA
5/11 Bank shows check cashed
6/4 at 6pm PST received email notification that passport application had been accepted on 5/12
6/4 at 8pm PST email notification that passport application was approved
6/7 Passport book/card shipped from AZ
6/9 Scheduled delivery

One thing to add is I was checking my passport status every few days throughout and got the same "Not found" message until the morning of 6/4 when it showed accepted, and then I got my first email update later that night