Both me & my wife applied on 10/24/20 (Saturday). Both got CA on 10/25 (took less than 24 hours on a weekend!) and after some retries, I got an interview scheduled for 10/26, so less than 48 hours for the whole process. Interview took like 5 mins; I didn't have a long/crazy list of countries I visited before.
Looking at the statistics, seems that LPRs approvals are much faster. I guess the reason is that during the LPR process DHS already collects all the necessary information, which otherwise takes a lot of time for them to collect before they can grant CA.