Do you have a source for that? Not that I don't believe you, but I'd be interested to check out what they have to say about the 2014 model.
Edit: I found this article that states the Mustang will continue the heritage theme. :shrug:
J Mays Hints At the 2014 Ford Mustang
J. Mays said it himself that the next Mustang can't be an evolution of the 2005-2010 body style. It will be Mustang's 50th anniversary making it crucial that this design is a step forward. It's from that same interview you posted. Will it have heritage themes sure, will it look like today's Mustang no. Think of it as going from the New Edge to the S197.
J Mays hints at all-new “very cool Mustang” coming in 2014 | Mustangs Daily