I got that email shortly after my application was completed and my last rec was submitted. According to the FAQ on the Genome Sciences website: "We should have an answer for you by mid-January, if not sooner. Finalists for admission will be invited to visit the department in February."
Basically, they will let you know if you got an interview before mid January, but likely much sooner. So far I don't think anyone has heard from them so there's no cause for concern.