[introaway]

That doesn't strike me as empathy - I'm not villifying it either, but it's more about personal psychological needs than the needs of others (which lumps it in with most behavior of course, hence not villifying it).

Sure, for their mental model of other people they're being nice (and in some cases they actually are) - but not everybody has the same mind or preferences. True empathy is built on understanding that.

[GoblinSlayer]

I have this impression too, that extroverts are socially numb and hardly notice anything, sometimes even oblivious about people around them. Well, due to this numbness cheap talk has no chance to get through their skin. In this way extrovert is a literally precise term: lots out, little in.