The pic looks authentic. I do photo retouching for a living and the photo of Steve Jobs outside of the restaurant does not look retouched, all the shadows and highlights are in perspective and look ok. All the lines drawn that were dropped in as proof are a joke and prove nothing.
I don't think it's shooped, but I just love this image.
And, as usual, there is an XKCD coming dealing with Photoshop. I love that comic.