This is one of the threads you may be remembering, and it was mostly about G4 Platinum/G5 Mobile.
Can’t say as I’ve noticed any change, personally. I’ve been getting the same averages: Last box, which expired 09/2019: 45, 39, 37 and 18 days. Box before that: 47, 40, 36 and 24 days. Currently on day 16 of the first sensor out of my latest box, expiring 01/2020. Was unusually noisy in the second week but has calmed down.