After you file

I too have been waiting and checking. Filed on 1/27. Still says processing with no changes for weeks. Received a letter today saying they are verifying credits, income, witholding, etc and will take up to 60 days. Not to bother calling for 60 days. Once reviewed they will send all or partial refund. Is this just random? We have the same income, credits, witholding, # of kids, etc as we have for the past 20 years.