Does America have much more restricted use of sugar when it comes to chocolate and sweets?
It comes to mind when thinking of the Simpsons episode when Bart and Lisa are in London eating chocolate and hit a sugar rush rather quickly.
I find that an odd question... when every other thing posted about America is how we have so much sugar in everything and that's why we're fat.

As far as I know, there are no limits on the use of sugar in anything at all. (And I know there's no limit of HFCS [high frutose corn syrup] as you can find that crap in every imaginable amount.)
Corn syrup is incredibly bad for your health. It makes your insulin levels spike like crazy. Some researchers consider it a large contributor to the gap in life expectancy between Americans and Europeans.
I'm not advocating one way or the other, but there's no definitive answer on that yet. Some research shows that it is unhealthy, others do not. I personally believe that it's like everything else in the world of food - including cane sugar - it should only be used in moderation. Being it's in absolutely everything in the US, that's a far cry from moderate.
Hershey's chocolate uses some weird process with the milk that makes it taste like it's gone off. Apparently it's not noticeable to people who grew up with it, but to those who didn't, it seems it's often described as tasting of vomit, having a strange cheesy flavour and things like that. It's the only chocolate I haven't even been able to force myself to eat.
It's only not noticeable to those who haven't had "real" chocolate. There's a marked difference between Hershey's and Lindt. Oddly enough though, there are those people who prefer the terrible waxy consistency of Hershey's... I have no idea why. I'll stick to Lindt any time I have a craving for chocolate.
But it does bring up the funny way of how where you're raised and what you're raised on will effect your taste later on in life. There are things that some of you have grown up with that I couldn't even imagine eating and vice versa.