I saw this site mentioned in Rolling Stone and had to check it out: Ads vs. Reality shows both a photo of a fast-food item as seen in the restaurant's ads, and contrasts it with the real-life smushed and smaller burger (or whatever) that you're actually served when you go there.
Some of them are not that far off (the Subway sub looks pretty similar to its ad) and some are pretty humorous (the Arby's roast beef and cheddar looks like it was run over in the drive-thru).
I'm not touching one of those KFC bowls, though. They look like throw-up to me. And no, they don't even deserve the more adult description of "vomit." Throw-up.