FWIW, from the Facebook group yesterday:
DS: "As of a month ago, Chevy had replaced 16,000 batteries and had shipped 24,000 batteries to dealers. They have been ramping up at a furious pace, but we are obviously a long ways away from wrapping this up. My sources say that the GM engineers wrote a program prioritizing your position in line based on the individual vehicle Onstar data - how you drive and how you charge."
DC: "Where did you get the information on the programming and the completion numbers? It's great stuff and I'd love to verify the source. Thanks."
DS: "He is a GM exec deeply involved with this recall and I'm sure he would not want his name out there. I trust his info 100% though."
8500 in 2021 Q4, another 8000 in January 2022?
8k/month seems reasonable.