I go at 7am on a Sunday and its always quiet....just the way I like it. Did have to run there mid week after work a few days ago and it w very busy.
I suspect, like myself, people are buying a few different items, downgrading to store brand on some items, eating more pork and chicken instead of steak/beef, some frozen veggies instead of fresh produce, etc... but people still have to eat, do laundry, clean house. When there is a good sale, I stock up too.