It sounds to me like the article author calls that social awkwardness not autism, no?
>The key distinctions are that socially awkward individuals understand what they should do socially but find it difficult or uninteresting (versus genuinely not understanding unwritten rules), show significant improvement with practice and maturity, are more comfortable in specific contexts, lack the sensory sensitivities and restricted/repetitive behaviors required for autism diagnosis, and generally achieve life goals despite awkwardness rather than experiencing clinically significant impairment.
It seems to me that this sort of definition would preclude any person having general intelligence such that they are able to learn to mask (or feel like they have to mask less in certain safe areas).