Nice , The mythbusters did this in their fingerprinter scanner episode ,
although they didn't have the iPhone5s but I am sure the same principle/technique would work.
As I remember, after using a similar technique they started working backwards and found a simple photocopy (no gelatin or other simulated finger) would do it. Apple has at least beat that horrifically low bar.
That was a great episode. Beating the thermal sensor was great too.