I find it really interesting that so many of us here are autistic or ADHD or both.

Yeah, we can sniff each other out like bloodhounds.

There's something about being on the spectrum that makes you... I don't know, insightful? Harder to fool with obvious bullshit?

Maybe. I do hesitate to associate autism with automatic intelligence as that can lend unneeded authority to those on the spectrum who should not have any. What I think is that we don't go along with the usual social performance. Criticism is "rude". If someone has managed to publish a book, the assumption is that they're automatically better at writing than you, I think. Also, there's this movement of anti-intellectualism, which touts criticism as "elitist", and insists that it is somehow snobby to assign some literature as better than others.

Autistic people likely don't buy into this as much because we don't feel the social pressure to do so.

I do know that in other areas of my life I often spot things well before anyone else does, frequently to the point that nobody believes me until they figure it out for themselves.

I can certainly think of several examples of that for me.