That shift is still going on. I currently live and work in the Seattle area, but a non-trivial number of my mostly liberal, mostly secular (I mean, even those of us who are religious like to have our religion and our politics on separate plates) classmates from library school have recently moved to the South, many of them to southeastern states, because that's where the jobs are.

I don't know how much that's the case in other professions, but I wouldn't be surprised if those which rely on a population to serve in an intellectual capacity (teachers and librarians, for example) are expanding in such a way as to draw workers from outside the region. It'll be interesting to see what effect this has.