I have done a lot of research on this topic and I am convinced that HFCS is the major cause of obesity in the USA.
That sweetsurprise ad by the corn refiners association is misleading. HFCS may seem to be almost identical to table sugar (which isn't all that great for you anyway) chemically, but research has shown that it is much more to conducive to obesity in rats than regular sugar.
Glucose decrease hunger, while fructose increases hunger.
Personally, I have lost a lot of weight since I quit drinking pop. My blood pressure also dropped a lot when I quit consuming fructose even before I lost all the weight.
BTW, this is an excellent example of how governments distort markets to harm people. Basically, all those corn subsidies are helping to make us fat.