I'm in the process of updating the scores posted at my website and I just rated Dec. 15th puzzle a 7. MrOoijer is to be congratulated, he guessed it would be less than a 10. It is only the second puzzle at this site to get a score that low.
For those of you who have been trying to guess the scores for the 10th and 11th (you know who you are: UTH :), they are 15 and 18. See my website for the complete list which I have just finished updating (URL is in my profile).