Photo spoilers and speculation
So according to "Gleeweb.com" this was taken on 11/18.
Note, he is still in his Dalton Uniform.
This was also supposedly taken 11/18
Finn and Rachel shopping for Christmas trees.
If these are accurate as far as date taken etc, then Kurt is still at Dalton for the Christmas ep? Unless (because the cast has said they film diff eps all together like on a Mon they could be doing scenes for one ep, and Tues doing scenes for another), they are alternating scenes from diff eps.
Ryan Murphy also said in an interview this week (can't find link at the mo) that the bullying storyline would continue throughout the year.
So does this mean that the cliffhanger over Christmas break is when Kurt will come back to McKinley (and Sam?)
Source here
http://glee-web.com/gallery/thumbnails.php?album=210