It would depend on what part of January. If you mean during the first two weeks or up through the Marathon, I'd say little to none, but if you mean the end of the month, I think there might be a chance a the 7 month mark.
We got a studio in late January 2007 with no problem. The resort really didn't seem very full at that time. We also got a GV at OKW for September without a problem. People compare late January and September on the same level crowds....so take it as you will!
I hope I'm not the bearer of bad news. I actually rented points, and was told it was the last grand villa for the week I'm there...I'm going Jan 26th thru Feb 1st...
Maybe you can get on a wait list? GOOD LUCK!!!!! I hope you get one!!!!!