As always, you're wrong.
When it gets started does play a major factor with it . . . this is why so many people in retail are sick of listening to Christmas music by the beginning of December, because they've had to listen to it all November long.
Conversely, when you have those who don't even start celebrating till a week, or even days before Christmas Day, then put everything away the day after, of course they're going to feel short-changed and wanting more, because they didn't get much time to enjoy it.