About 5 months ago, I posted a question asking for people's experience with One Stop Security and as a Global Entry holder, the ATL arrival and connection process in December was pretty much the same bar not having to wait for my suitcase as it was automatically rechecked for my next flight.
I recently arrived in Atlanta a few days ago and had another domestic flight to connect to, and thought I'd share my recent experience if anyone finds it helpful:
Arrived in Concourse E on flight DL31 from London
When arriving at the hall with CBP and GE kiosks, airport staff asked us to follow a purple line that was taped to the floor and directed us to another side of the hall that had CBP officers. I am a UK citizen so I went into a separate line to the US citizens (the US citizens got to use some sort of face scanner). I was a bit confused since I have Global Entry but that did not seem to matter. I was in the line for about 10 minutes alongside people who did not have Global Entry.
Spoke to a friendly CBP officer, asked the standard questions (Trip length and business/leisure) and that lasted about 30 seconds.
I was then asked to keep following the purple line, where I went down a set of stairs, but rather going further downstairs to where the baggage hall is, I was ushered to a door which opened right into Concourse E airside where the Delta Sky Club is.
All in all, the arrival process took about 10 minutes and it was so efficient. I hope this is helpful for anyone flying into Atlanta from London with Delta and connecting onto another flight.