I'm in Atlanta and have been trying for hours. Don't know how its rolled out but don't think its a East to West rollout or anything.
THESE ARE NEVER RELEASED BY GEOGRAPHICAL LOCATIONS!
They are only released by google's OTA servers and device IDs at random. I imagine a future where we never see "I'm in ______ and I haven't got it yet?!" But that will most likely never, ever, ever happen.