I've had three responses today from two different uni's so its possible.
Today isn't Christmas. And there are usually delays of several days or even weeks between an actual decision being made and it showing up on Track/you getting an email from the university. The fact is that universities go on hiatus over the Christmas/New Year holidays. If everyone else is gone, what makes you think the admissions people are still there? In fact, try calling or emailing the admissions office next week, I'll guarantee there won't be any response (unless you send an email, in which case you will get an automated "we're out of office until X" response).