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If we can find specific subtypes it would be extremely helpful. You can’t expect everything to be presented only with a complete solution.

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Exactly, lumping in all autism into the same overall category when there could be very different underlying biological mechanisms would potentially block progress.

For example, a medication that could work wonders on one subtype by affecting a biological mechanism unique to that subtype could be found not to meet clinical standards because it didn't work on the other subtypes or even make them worse.

In other words, it's a confounding variable which needs to be discovered and characterized after which it could play significant role in advancing treatments and understanding.

That is a fair point, or two. My frustration with studies of this type is that they provide very little guidance with respect to how to prevent a condition, how to fix a condition, or how to manage a condition. Nor, do they give me much hope that even a long way down the road will they do so. My focus, because of a family situation, is management. Whether there's one type, four types, or more than a thousand types is, to me, immaterial. Even if this study was a complete genetic explanation of the mechanism, it wouldn't help, because I don't work with genes, I work with gene expressions, manifestations and symptoms.

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