Maybe you are getting old! Mrs T and I were like you, last minute before putting a tree up etc.
Now though I have the Christmas spirit and so has she. Maybe because we were out last week and had a Christmas meal at a pub which was turkey, and we know the chain so will be going there for her thanksgiving meal of turkey.
So I don't know what is in the air, but I feel more and more people have got the Christmas spirit this year. Maybe people are just fed up and thinking back to how it was when we were kids.