I flew out of STL on April 25. I went to the airport with a colleague who was on a 12:30 flight to LAX. My flight was to DFW at 1:15. No problem with security although the elite/ AAPriority lane was not open. We made it through security in about 20 minutes. AA is using the "C" concourse security lanes which were in the process of being changed. The "D" concourse worked fine. It was a bit crowded at D4 for the LAX flight but not too bad. The worst thing was that there were no services (food, drinks, newstands) open on D.
Ironically, DFW shut down due to a storm and I was diverted to OK City to refuel. Got back to DFW and my flight to MSY was delayed so I made it. Long day with little food due to nothing at STL and no time at DFW.