The reason it tastes weird is due to the use of soured milk,which seems to be common in US chocolate. Historically dairies used to be enough distance from US chocolate factories for the fresh milk to start souring. By the time better milk transport had reached the US,most people had grown up with such chocolate and basically had gotten used to it.
However,its just plain funny,that to save a few pennies,Hersheys would rather make the chocolate in China and ship it to Europe,instead of directly from the US,then mark it up because it is "American" !!
BTW,I am not advocating that I find Hersheys the best chocolate in the world,it just makes me giggle that a real American icon is made in China and its food of all things,not your washing machine.