In my family, we are known for our strange "subject hops" mid-conversation, which are associated with the same kind of associations that Temple Grandin describes. We are all used to it, and those who spend too much time with us can follow (or at least accept) them.

To me too this seems absolutely normal! We used to call it 'grasshopper logic'.

And what after all is a non-sequitur but a train of thought that no-one else can follow?

I believe the different connotations and connections that different people have/make from the same starting place are fascinating.