That Weston Price piece made me toss the bottle of agave "nectar" I had pronto. I've not used any in a long, long time but used to fairly often.
The part on HFCS was excellent, just enough science to give body, not so much as to overwhelm. I had heard about the reverse molecule on the radio once, but never have seen it in print.
Look, fructose is just like anything else entering our body. Some small quantity is not a problem, huge quantities are. What those quantities are depends on the substance, mostly. That's why toxicology has the LD50 and LD100 rates. People have eaten lots of honey and fruit w/o problems gaining weight. But what was "lots" in 1900 is not the same as in the Big Gulp era. You can eat too much of anything considered good in the PB, also. Nature has no perfect food.