That's not been my experience of Seattle at all. One of the reasons I have stayed here so long is that there's so much cultural overlap between techies, artists, musicians, burners, etc.

Maybe this is something that has been changing recently - I hear people griping about "brogrammers" now, though I've never actually met one, so far as I know. And perhaps Burning Man culture is not the binding force it used to be, now that the event has gone mainstream.

It did take me at least a year before I really started making any friends here, but my experience has been that... once you find your way in, you're in.