If the actual total sugar (or sugarlike) content decreased along with the corn syrup, there definitely would be differences.
Ask anyone who's visited the US about how the food tastes. It's not just that serving portions are much bigger, but everything just tastes sweeter too. I've had people tell me they visited the states and even the plain white bread was sweet in comparison to everywhere else.
This. Mainstream food in the US is unbearably sweet and sugary if you come from anywhere else in the world. Drinks are sweet. Chips are sweet. The deep fried onions at Olive Garden are sweet. The gravy for the prime rib is sweet. The goddamn bagels are sweet. They put marshmallows on top of baked sweet potatoes for thanksgiving.
Ask anyone who's visited the US about how the food tastes. It's not just that serving portions are much bigger, but everything just tastes sweeter too. I've had people tell me they visited the states and even the plain white bread was sweet in comparison to everywhere else.