Who said I was surprised?
I said I ask myself the question of why only one twin has autism and not the other whenever a new 'theory' pops up.
Given that they have been raised together, had their injections on the same day, same batch, same doctor, been exposed to the same foods, same amount of plastics, same amount of parental stress n the womb blah blah blah.... why is only one on the spectrum?
FWIW, unless there is scientific evidence (several studies done by reputable people) of the cause of autism then I take all theories with a grain of salt.