Sorry to break the pattern, but my CTR is the same today as it was yesterday and the day before. But I agree that for those who have a low CTR, it's likely due to the holiday. Don't expect it to get better until Tuesday.
I'm not sure I buy the argument that advertisers budgets are "drying" out because it is the end of the month. I haven't changed a thing on my site (in terms of ad size, type, location, colour) and I have been seeing over the past week the same number of impressions, but my EPC is up almost 40% AND my revenue. So, what gives? :)
My impressions are way up on last week, but my number of clicks is about the same (so my ctr is lower) but i figure this is because I have picked up a bunch of non-relevant traffic from somewhere rather than anything else.