dear friends, since you are already in the line for your approval of I 485, you are safe. The CIS is working on those files in thier office, there is not chance for them to put your case away. the reason they set up the retrogression is to let those people waiting outside the office to go home to warm up a littile bit, then come back to wait again. I think the CIS will work harder to process our cases in order to catch up the time fram. Still you shoul follow up the processing time published by CIS for different center. Just relax to have a good holiday time!