The leaked Pic is highly likely to be the photo of the real thing.
The pic is leaked by a highly trusted source, the source is the first one who leak J-10b's photo.
And on 22/12 there are more than one eye witness of this fighter, some of them are highly-trusted ones, they also confirmed the side-view of the fighters (shape/color etc).
As for the shape of the aircraft, note the light can do wonders and due to the light there is some distortation about the fighter, the real thing looks "thicker" than it is looked like in this pic.
As for the real fighter, the shape of vectical tails looks like the one installed F-117, the fighter looks very flat from the lower end (like F-22), has DSI-like air-intake, arranged in a similiar way as in-between of F-35 and that latest French fighter Raflae or something (sorry, dont bother to find the spelling of it).
The front view of it looks somehow like a F-22, but the side view make it look a little bit like a F-23, of cause, the most important part, the top view is still remained unknown.