Not really surprising when all food is so processed and pumped full of all kinds of bullshit, from high fructose corn syrup to preservatives to you name it.
Fun anecdote - I moved to Europe from the states a year back, and lost almost 20 pounds in that time without explicitly doing anything different. Just from the better food quality, and walking more in daily life (walkable cities and good public transportation!)
Well, I meant as in, without actively changing anything, like going to the gym more or whatever. Just passive environmental changes.