It doesn't appear to be obvious in what way these pictures are enhanced, either, as one would need the originals to compare. I'd be more inclined to judge Gimp with pure digital art.
I think it's a somewhat sleazy ploy to get people to find the tutorial DVD that you can buy[0]. There does seem to be some content there, but I really don't like this submission as it only says "here is what you could achieve" without giving away at least a little tutorial. I could achieve the Mona Lisa with MS Paint, probably, but how is that noteworthy?
