No, it's just us select few who know about the vortex. I'd say that almost everyone here is used to weirdness, just not vortex sized weirdness. There are mutants and wizards and gods roaming the streets of most cities. But most of them are native to this world.
And there's a website some people here made to explain things: [addy]. It's a little colorful so you might want to shield your eyes at first.