My wife's first US passport, routine handling:
03/31/2021 - Applied at USPS
04/03/2021 - Delivered to Philadelphia processing center (according to USPS employee who looked up tracking # for me)
05/05/2021 - "In process" status and check deposited
05/25/2021 - Shipped with USPS Priority Mail tracking # (no estimated delivery date yet but shipped from Little Rock, AR)