Earlier this month, I saw some applicants got their case closed on the same day or the day after. Then, receive their citizenship certificates within a week. I don't now what happened lately as I noticed people are waiting longer than before. Personally, I waited 9 days to see the case closed update. Haven't received my certificate yet, I am expecting at least another week to receive it. Even though, IRCC stated that we are expecting a 2-4 weeks timeframe to receive the citizenship certificate, I think, lots of people would get it within 2 weeks before. But recent trends suggest that we might need 4 weeks or more.