A bit of a self-satisfied, everyone-else-is-a-fool, told-you-so story for the teller. IME, those are signals that the story reveals the teller, the culture of the teller, but not facts.

Of course, I don't know. I think the hard thing in these situations is that we humans tend to trust personal stories like this one - it's rude not to. My comment is rude, in a sense, transgressing in this social interaction. But the accurate, truthful course is to treat the facts as [edit:] nothing - not as maybe true, etc., but as if they were never said.