Has an iPhone 5 Prototype made it out of Apple?

It is possible that an iPhone 5 prototype has made its way out of the unknown labs at Apple. According to a Gizmodo article, it appears that a Chinese manufacturer of iPhone cases is showing an iPhone 5 in one of their cases, complete with the miniaturized dock connector.

The question now: is it really a prototype, or is it just a simple mockup?

If we look to history, we know that prototypes from Apple have made it out into the wild, so it is possible that this one is in fact a real model. One recalls the case of the iPhone 4 prototype left in a public house. However, one would expect security at Apple to be tighter these days, so perhaps not.

Gizmodo says that the images do look realistic, but we know that with computer graphics constantly improving, the limits of creativity and imagination are really the only thing holding someone back from making mockups.