I know the topic doesn't make any sense but I couldn't figure out how to phrase it.

I sent in my 360 to MS about a week ago and they just received it today. I got the e-mail saying that they got it and then about 4 hours later I got an e-mail saying that they were sending my console back to me. Does that mean that they fixed it or that they are just sending me my old one back? I didn't mod it but the warranty sticker was removed so I got a new one put on.

So my question is: is it a good sign or a bad sign that they e-mailed me back so quickly?
Thanks