We're not seeing that here in Western Oregon. My old lady did a shopping trip last night and had no problem getting everything on her list and a few things that weren't. She picked up a case of TP from Costco even though it wasn't on the list. In my experience, around here Costco runs out of TP long before other stores. After the first round of batcrap crazy, Costco ran out of almost all frozen foods.
Tony