DCA ground agents are particularly terrible when there are delays. They rarely give helpful information and routinely insist that they know nothing which I've come to realize is normally true, though no one seems to try very hard to get information. Calling in to the executive platinum line has also become fruitless, they mostly can't help or don't want to lift a finger. I've found that going to the Admirals Club is my only hope, the agents there will usually try to find out what is happening and that usually requires them to pick up a phone and call someone in operations, which can often take many minutes.