Well, for one thing, I'm a graphic designer and that is as horribly obvious a "Photoshop" (which I use daily) as the phony smoke over Lebanon.
Even the most casual of photographers can recognize the difference in light on the subjects. See how it's the same on the Romneys, but different on MLK? Also, look at MLK's jacket, between the mics. Doesn't it look a bit "unnatural"? Yes, it does. It's because the picture fraudulent.
So, my experience in my profession is my source. You can call it "prejudice" all you want. I call it "reality".
and 148 is also photoshopped?
We can't all be pros. ;)
I'm not a graphic designer and it was obvious to me too.