We don't have a Super Walmart here in San Diego (denied by City rules several times) but I've found that Walmart prices in general (for cereal, snacks, etc) are a bit cheaper. However, to me the price differential is not worth the pain of the arrogant people who shop there and block the aisles while they browse and knock into your cart as they go past. Conversely, the Super Walmart at my brother's house (outside Vegas) doesn't seem to have especially cheap prices on most of the food ... compared to the prices in San Diego (OK, not really a fair comparison, but if they're talking about national savings, I would expect their prices to be consistent everywhere.) Here in San Diego, I've found that the bigger chains (Vons, Ralphs, Albertsons and Costco) are way over-prices compared to most of the smaller stores, even on name-brand items...so I guess that's why they offer their incentive programs--so you can get the discount price to match the local stores. Anyway, comparing Walmart to the big stores, I would expect a 15-30% savings if you don't use coupon, don't buy items on sale, and don't use the incentive programs. If you use those, your difference may be closer to 2-5%.