If your looking to take tank shots w the phone the 4S, and more so the 5 are more than capable of taking very nice shots w the stock lens. These were all taken w a 5, stock lens and minimal PP using Laminar.
those pics look great!
thanks for posting links, i am leaning toward picking up the olloclip because i can go and pick it up at a store instead of ordering it. its a gift for my wife, along with the phone and as usual i came up with the idea pretty last minute