It tells us a lot about Google's current 'understanding' of words. But it also highlights a lot of misunderstanding.
That's my point, yeah: real-world.
It's a douible-edged sword - I've seen quite a few synonyms in Google that my thesaurus missed. I've seen the names of manufacturers "linked" (correctly) to abstract brand names... by abstract, I mean word(s) that don't "officially" exist.
The power of computers is often their ability to make connections (and groupings) we don't immediately see.
I think search engines are playing catch-up when it comes to keywords