[criley]

Why only Huffington Post publication? They're widely known for alt-medicine and anti-science, and anyone reading science/medicine should rightfully be wary of anything on HuffPo, which has often lent it's publicity and support to anti-scientific groups.

Also, don't you mean it's more than a two dimensional spectrum, as one dimensionality would be a single point, not a line.

And, even if you did mean two dimensional, I think you're being unfair to the DSM-IV/DSM-V which does not literally define Autism Spectrum Disorders as falling on a two dimensional spectrum, but just uses the word to figuratively explain the variety inherent in the diagnosis. They include multiple levels to the spectrum which alone make such a spectrum "3d" and thus more 'cloud-like' without ever having to resort to calling the APA and it's Diagnosis manual as wrong.

Although, I bet calling the APA wrong garners more page views...