The comment "We know their composition and how they are digested; as far as your body is concerned, where they came from is irrelevant." is astoundingly incorrect. 
As it is some time since this article was written, perhaps an updated article needs to be written.  Great strides in genetic studies show that the body DOES mind what you eat!  GMO foods will not deliver the nutrients of non-GMO food - your body is a finely tuned organism that over hundreds of thousands of years has evolved to 'run' on what the earth delivers - not what laboratories deliver.  The massive increase in the last 2-3 decades of allergies, and other more chronic medical conditions are due to the consumption of "food" that contains poisons.  It might look like food but we can't tell what it contains - many poisonous chemicals that are sneaked in through the process of producing modern "food".  For the latest on this subject, check out www.gmosrevealed.com