You know Michael Jacobson. Here is an article he wrote about McD's. Surprise! He doesn't like them.
I find it surprising that he thinks McD's made potatoes as french fries the default vegetable in a meal. Plenty of people had a potato is some form with every meal, before McD's blanketed the land. Some of these meals featured fried potatoes, I am sure. He might be on point more with the increased consumption of soft drinks, though.
Anyway, food for thought, if you are interested in good food vs cheap food, or health issues.