First off, Happy New Year to everybody.
I predict that twenty ten will be the most common usage now that we are past the single digits.
And the rest of the country will finally catch up with Charles Osgood (CBS Sunday Morning) who has consistently been using twenty all along. People have generally regarded him as a bit odd for consistently using that from the first week on ( twenty-oh-one, etc) even tho the entire rest of the country chose two thousand one, etc.
So, now the maverick can finally be a little vindicated when everyone else adopts the twenty mode of saying the date. Good for him for sticking to his guns all this time.