Zivush - 7:09 pm on Dec 27, 2012 (gmt 0)
Look at WMT/Traffic/Search-Queries, and then select Top Pages / With Changes.
If you see major changes, it means your overall ranking has changed.
If not, you are OK.
Also, compare Bing/Yahoo traffic changes to Google's. If you see the same traffic trend, you are OK.