This has been awesome and expensive experience! Here are my data points:

This is for Expedite Renewal Service (for two) at PHILADELPHIA, PA 19190 processing center.

6/25/18: 4:00pm Mailed DS-82 via priority Express ($25) (we put in two packets in express mail packet -> saved $25)
6/26/18: 10:00am Delivered to US Passport Processing Center (PA)
6/28/18: Email received saying my passport being processed (you need to check status and register your email address again to get this email)
6/28/18: Check cleared
6/29/18: Email 2:48 pm "Finished processing passport and it as been printed", Expected delivery on or before 07/04/2018 via priority express.
6/29/18:Received tracking number, in-transit
6/30/18: Passport Delivered!
Total: 5 days!!
Way to go passport office!