I'm not speaking from first-hand experience, but from information received from other people who have been to America.
According to the majority, there's not much in the way of food that Americans have got right! My poor DIL goes there on business, and says there's an excellent chance if her trips are longer than expected, that she might starve to death. The bread is inedible - miles too salty - and everything just swims in grease. She's been to some fancy restaurants and stayed in good hotels etc, but she said she hasn't had a decent meal over there at all! She visited some hamburger place in LA famed for the best hamburgers in the world (I forget the name) and after she'd drained off about a cup of fat from it, she just walked out. Breakfast is perhaps the worst meal of all. Toast either overdone or underdone, eggs ditto, bacon so fatty, and everything with about a truckload of salt in it. Even things like cookies, cakes and desserts she's found inedible for the amount of salt in them.
Other people have said Americans just can't do a decent meat pie, or plain old fish and chips.
The most common comment is that everything is overdone - it's too big, too salty, too sweet, too fatty, too many choices (like 100 different kinds of ice cream in one place!).
As I say, I can't speak from personal experience, but if this is so, it's very sad, and from my point of view, it's even sadder that Australia seems to be following similar trends. No wonder our population is obese and heart attacks and stroke kill us off by the million. Convenience foods are handy in an emergency, but when you're living on them - well, you don't live for too long! I have heard it said that malnutrition is far more common in advanced countries than in Third World countries. Something like 60-70% of our children are malnourished. Not starved, just not well-fed. And it's adversely affecting our intelligence levels, apparently. (Sorry, can't give sources, but these things came to me via my DIL, a biological research scientist currently investigating diseases etc caused by malnourishment.)
On the bright side, I'm informed that Americans have got Apple Pie pretty well down pat. Pity I don't like apple pie!!