Surprisingly, perhaps the best fried chicken I've had, anywhere, is from the Waldbaum's in Riverhead. I was in Riverhead this morning, and when I saw the Waldbaum's, remembered how good their fried chicken was and decided to grab some for lunch on my way out of town.
It's not only tasty but quite tender. I don't know what they do. I suspect they cook it at a low temp, maybe 325 or even lower, and the long, slow cooking breaks down the muscle fibers like a braise(?) Who knows. It is fairly greasy, after all--usually an indicator that the item was cooked below 350.