I was really surprised on Christmas Eve to have a couple of sales, then some more on Christmas Day. I've had sales every day since, although not as many as prior to Christmas, but the people are still out there shopping.
The sales I'm running in my shop aren't what are drawing people in, because no one is buying those items at all, and looking at my stats, they're hardly looking at them.
It's really hard to figure...I'm not complaining, mind you! So if you're not getting much traffic, spend some time to do what it takes to get your shop seen right now. Work on tags, titles, whatever you need to do to get up there in relevancy and search engines.
Good luck! (And with all that said, I probably won't have another sale for a week!)