Last year Wreck it Ralph and Rise of the Guardians both had significant decreases on Christmas. Yogi Bear increased by 17% in 2010 and Tangled also in 2010 increased 20% (mind you this was a saturday).
So it seems heavily targeted kids films do have muted Christmas's, good chance frozen will stay flat or even decrease tomorrow.
Adult films seem to have huge increases, for example the fighter in 2010 had a 167% increase.
My predictions
Hobbit +75%
Frozen -15%
Anchorman 2 +100%
American Hustle +115%
Catching Fire +70%