Over here in Europe, McD had some advertisements 2~3 years ago that now the buns are fluffier, the burgers juicier and saucier, the meat hotter. I did some digging and the calories stayed the same, meaning they basically put more air in the buns and more water in the patties to save on money, and to mask it all they put more sauce into it, which is the cheapest thing. I can’t go there anymore, it’s lost quality and you bite into a burger once and it looks like you’ve made out with the Hamburgler.
Oh and: McD over here used to be some real gourmet stuff. It’s extremely regulated.