No proof, but my guess is that MCD's bad quarter was due to that pink slime and the egg story. Europe was mentioned as they had a cold Winter, but they are more health conscious that the US if you just go by their GMO stance.
MCD is getting more health conscious as they have added oatmeal, I don't know when though. They did dump the pink slime in a hurry and dropped the egg plant in Iowa that made the news fast as well. They got a future.