That is a big boost
I happened to take a look at XFire statistics for played games and noticed that EVE actually had climbed up to me #2 among MMO-type games, pushing Guild Wars down to the 3rd spot. Looking at the details there is a significant boost in number of hours played, from about 10000 hours per day to something between 30000 and 40000 hours from the middle of December.
The number of users playing are still lower than Guild Wars though and people seem to put on average almost 5 hours per day. Is it the winter event or something else? Neither Warhammer Online or Lord of the Rings Online are close to EVEs (or Guild Wars’) numbers when it comes to XFire usage.