If that is Atlanta airport it is the busiest airport in the world so no surprise there. I went through there on both legs of my trip to Oregon earlier this month and had no problems.
Unfortunately I am more familiar with that airport than I wish I were. One portion of my 32 year career with Ma Bell had me flying every week for 10 months. I live in SC so every flight goes through Atlanta. They almost knew me on sight by the time I was through with the project I was on, especially the guy in the Starbucks booth.