I don't think so, no. It's partly due to the normal exodus of older retirees moving from the North East and Mid West to the warmer climates of the Southwest (Southwest and West saw population increases of 20-30%, compared to about 3% of Northeast and Mid West); but mostly, IMO, these population swells in the South are due to the lower tax rates offered there.

California is nice, but the taxes and business restrictions suck. That's why we (still) continue to see this huge influx of folks taking their businesses to places like Austin, TX or Nashville, TN.