the other stores i found had smaller chicken, sat under the lamps too long and were dried out. costco chicken have such a high turnover that they don't sit out too long before they're scooped up. they almost always get sold out within an hour or two, so when you do see them available, you know they've only been sitting out for about an hour.
and the price is only 6.99. how can you beat that for a quick meal? just make sure you have some bbq dipping sauce in.