Almost every job I've ever landed I interviewed in December. Just last month I interviewed a dozen people or so for roles in my company. My recruiter friends that I talked to all landed a bunch of offers last month.
Everyone is about to get swarmed with resumes right now but there's a pool out there with a three week headstart and less competition because of the reasoning I mentioned.
Late December is a perfect time for interviewing because of code freezes and lack of progress on bigger projects. We had more time to interview than candidates in pipeline during that back half. Plus it's a time of year when generally people are relaxed and in a good mood.
In my experience, you _can_ get hired but it tends to be much slower. These were all also small companies so only 1 - 2 people were sorting through applications.