We've only had three quizzes, so don't write off the concept yet. Of course, timing is an issue - especially for those of us who need to get kids into bed. However, we need to just keep plugging away for a few more times before taking a view, IMHO.
I reckon it'll pick up in January when all the festivities have died down. And remember what I said about telling newbies. Incidentally, how difficult would it be to send a blanket PM to all members advising them of upcoming quizzes? It seems to me that talk of quizzes only starts in General Chat on Friday night/Saturday morning. If you didn't know the site too well and logged in during the week you'd be forgiven for not knowing about the subject.
Anyway, that's just my twopenneth.
Incidentally, I'm unsure about the Christmas Eve quiz as my six year old wants to go out carol singing with her school friend in te early evening.