Okay, WTH?

I know that stores started playing christmas music today, if they hadn't already done so earlier. I don't like this fact, but I have come to expect it. But when did radio stations start jumping on that bandwagon? I knew that in a couple of weeks they would toss out their normal playlists and start in on a random selection of "seasonal" tunes, frequently to the degree of transitioning from country to soul. But previously the stations gradually eased their way into that by slipping songs that fit their normal genre into rotation before switching completely over. Not this time however.

Could this be a east-coast/west-coast thing? maybe something just specific to San Francisco? Or is normal radio just that desperate to not have me as a listener?