Why should it matter how quickly carbs are metabolized by your system? All carbs are converted into glucose. What's not needed for immediate energy is converted into glycogen, once the glycogen reserves are full it's converted to depot fat. This is true for all carbs. If you eat more fat and protein than you burn they will also be turned into fat.
A body that burns the same number of calories it consumes, or more calories than it consumes, will not create fat. Fat is created when people consume more calories than they burn. It doesn't matter whether it comes from protein, fat or carbs.
highly processed food is not what we were naturally designed to eat
What do you mean by highly processed foods? You make it sound as though we should all be gnawing on cane sugar or chewing on sugar beets. Food is processed for many reasons. You can thank food processing for a much safer food supply today than we had 50 years ago.What is it specifically about processed foods that our bodies are not equipped to manage?
However, I believe that processed food,meaning highly refined carbs and sugars (high fructose) are giving us way more caloric intake than we would normally get. Of course its up to the consummer to decide howmuch he shovels into his piehole.
Personally I prefer fresh tho processed and I avoid Hydrogenated where possible