[fasthands9]

>Individuals have unique responses, which can vary by degree and also by direction.

I think the tension is that that are errors in both directions here. Sure - some people will have worse results than optimal because they followed advice meant for the "average" person when they have unique body chemistry. But on the contrary many people who think they are unique will shun advice for the "average" person and have worse results.

My hunch is that more people make the second mistake than the first.