Food costs are rising. I've noticed that even at the bakery thrift store, where we buy our bread, prices have risen a bit. I've always kept a pretty good lid on the food costs. I shop primarily at our local walking-distance independantly-owned market, and fill in with bulk purchases at Costco. For me, doing the Grocery Game wouldn't save us anything, as we buy very few convenience products. Most of our meals are cooked from scratch.
We do have an upright freezer, so I'm able to stock up on the items we use frequently and can thus avoid extra trips to the store. We use a produce delivery service, not so much because the cost is less than buying the produce at the grocery store or the farmer's market, but to AVOID trips to the store and thus temptation. What we get in the bin is what we'll eat as fruits and veg for the two weeks. If we run out, then I'll throw in a trip to one of our many local farmer's markets.