Two data points from today. They may not mean anything.
MDW about 9 a.m.: Wide open, no waiting in either the regular or priority lanes. It was just about as open as I have ever seen MDW mid day.
BNA about 1:30 p.m.: An absolute zoo. Passengers on the C side were backed up in six or seven lines all the way back into ticketing and nearly to the outside doors. Maybe they were making good on their promise to back everything up due to the sequester. Maybe just heavy traffic. The concourse itself was packed as well so maybe it was just a busy afternoon.
I fly out again Sunday. Going to add an hour just in case.