i can predict it with near 100% accuracy anywhere in the world. just show me where all the artists and musicians in your city hangout and pay less than 900/mo on rent.
That said - there's a new kind of 'suburban gentrification' which is another thing altogether: middle class people not looking to be so much hip, rather than just live in a decent affordable area near downtown that's not crackburg.
Well, that is the trick bit.
I was thinking about this two summers ago when there was that migration “crisis” in Europe, i.e. that Facebook knew better than anyone else on the planet how many immigrants there were (give or take) and especially from where exactly they were coming (that was a very contentious point back then) based on their location data and on the location data of their friends and families left at home. Come to think of it, I bet they could also “guess” the general level of education for many of those immigrants, that was also a very, very hot topic back then.
Of course artists and creative people in cities tend to be more liberal (because cities in general tend to be more liberal). But in my experience it is rare that the lgbt epicenter and the art epicenter are colocated. Of course art people might hang a rainbow flag out, but that doesn’t mean there are more gays/lesbians/queers living there.