I think the terminology of "incredible" is the operative word but I agree, if it could help, great. But I'm very skeptical. I find it hard to think that your gut biome can affect your brain so much that you struggle with social queues but are able to have an amazing memory.

But then I've met people not on "the spectrum" who have an amazing memory, such as a professor I recently met with who could remember the page numbers for certain phrases in books. Perhaps Asperger-level people just have the ability with the added challenges of autism?

who knows

Savantism is a separate concept from autism, though popular culture has somehow associated the two.