Is it acceptable to send a polite email asking when admissions decisions will be made?

After a very stressful fall, I've finally got in all my graduate school masters applications -- so of course I'm super on edge and will continue to be until I hear back. A couple of the schools had Jan 1st deadlines, while the other deadlines haven't gone by yet. Would it be frowned upon if I sent the programs a polite email asking when admissions decisions will be sent out? Is it too soon?