It depends on what school it is as to whether or not that's in a particularly long time frame, but I'd say just hold off until at least March. It's killing me waiting on Harvard because I really want to start narrowing down my options but there's not much to do but wait right now. There's probably tons of people calling about statuses and that's not going to make them go any faster. Unless they gave you a date you would hear by and that was over a week ago, I'd say hold off.
It's with GW. When I applied it said 8-10 weeks and it's now been 10. Every time I call they say "you'll hear within a couple days" but it's now been a couple weeks...