I do not understand why people aren’t satisfied with the uppermost (open) case of whatever when there’s a large stack (and, let’s face it–everything is stacked at Costco). I watch them struggle to lift 4 or 5 cases so they can pick one box of raisins from the 5th level down. I get if there was one left on top that was crushed or some other moron opened…but, really?
The other one is the family of 5 that walk next to each other (think front line of an NFL team) while pushing the cart as slowly as possible down the ‘wrong’ side of the aisle.
Most stores practice (or should practice) FIFO, or First In First Out. As long as the store is adhering to proper practices and the current product is not all from the same shipment, then yes it should be fresher the further back you go.