It strains credulity to believe they created a mockup for their documentation to be used by end customers, when it would be simpler to take screen shots of the actual menus so that users would not be confused, should design challenges change the interface. As a former developer, I can tell you that it is far harder to document something that has yet to be written. While it is by no means impossible in this day of Photoshop and sophisticated editing software to create nearly anything imaginable, the question that would have to be asked is why a corporation would do this for one of their own products? At a public media event to demonstrate some new software or feature, sure, but to quietly slip it into their support pages without fanfare? Conspiracy theorists will never be satisfied, of course.