andrewshim - 5:12 am on Dec 28, 2009 (gmt 0) January's just around the corner though. Something to look forward to.
It's not just visitors who aren't interested in clicking Adsense right now. Advertisers are probably also taking a break, enjoying the fruits of one whole year of work. I'm noticing many regular advertisers missing from my front page, which leaves me with ads that are still on target but less "attractive" or "convincing", which probably explains the lower CTR.
January's just around the corner though. Something to look forward to.