Final stats:

Applications submitted: August 27th
Conditional Approval: October 20th
Interview Scheduled: October 27th
Cards Received: November 2nd
Self: US Citizen
Spouse: Canadian Citizen w/ US Green Card

Interview was about 10 minutes each for my wife and myself. When we arrived at Port Huron (many slots available), we talked jointly to the Canadian border official, then each spoke separately to the US CBP agent. Scan, photos, out. Getting conditional approval from US and Canadian officials is the longest part of the process. The rest is very fast moving and straight-forward.