I don't doubt the assertions about the interchangeable names, but I do doubt some of their other asserted conclusions. It's not HFCS specifically, it is carbs in general, combined with monoculture diets that affect our health.
I listened to an Anthropology lecture (on youtube) reporting the health of hunter gatherers prior to the agricultural revolution as being BETTER than today because of how varied their diet was and how limited our diets are...