I actually have found ATL to be very easy as well. Just my experience, I suppose. We just got back from CSS on Sat, 3/23. Landed in ATL around 5pm (30 minutes late) and we only had a 2 hour connection to start with. I was a little worried about making it to our connection but knew there was a later flight out if needed. After it was all said and done (get off the plane and we were in the "back of the bus"), went through passport check, got our bags, went through customs, re-checked bags, went through security (and even got stopped to check one of our carry on's), got on the Tram from Intl Terminal to Concourse B (so further away) and walked up to our gate)... 22 minutes in total. I was impressed but there weren't any lines.
Linda & Nick
CSA - Oct 2004 (for our wedding!!!)
CN - March 2006, Nov 2013
CSS - March 2013