No, I am. I'm just doing a poor job of explaining it.
Here's a dumbed down example (for illustration, not saying I've experience these exact figures) in hopes I can make myself more clear. And I'm not talking about us going through the Delta terminal, we don't fly Delta from ATL
At Atlanta I can get in the line at TSA check point and be 50 people back. It will take me 15 min to get through.
At MCO I can get in the line at the TSA check point, be 50 people back and take 45 min to get through.
Same number of people in line, takes a lot longer to get through.
That's what I'm comparing. Not talking about how many people show up at once but comparing being in the same size line at each location and how long it takes to process the line
Same number of scanning stations? Were all stations open and running? remember that the TSA staffs the number of stations based on what the EXPECTED passenger flow is. That's easier to predict in ATL than in MCO for the reasons I pointed above.
Another reason - ON AVERAGE, you have a more experienced traveler in security at ATL. MCO has to deal with a lot of kids, strollers, babies, etc. Also a lot of elderly compared to ATL. ATL's crowd is generally in the over 20, under 65. Not saying there is anything wrong with being young or old. However when it comes to security, that crowd is quicker to remove shoes, laptops, etc.
ON AVERAGE, MCO has people who have more liquids and medicines in their carry on (based on where you are going / coming from, the profile for a MCO passenger includes things like suntan lotion and toiletries in carry on baggage as their bags are checked in by Bags-to-go (DME / Cruise Lines). If they are cruise line, their checked bags were collected the night before and they never, ever remember to move it at customs).
ON AVERAGE, MCO has more people triggering the restricted materials sensors in the x-ray machine requiring more manual inspection of luggage (often because of ruboff of things like suntan lotion, spilled substances and liquids on their clothes, etc).
ON AVERAGE, MCO has more people who require manual inspection because of hip surgery, pace makers, etc. (Grandparents or older visitors to parks).
Again, these are averages based on passenger profiles. I cannot speak to the exact line you were in.
We have a saying in the industry... "When you've seen one airport, you've seen.... one airport". EVERY airport is unique and a solution that works for one may not work for another based on things like passenger profiles, flight schedules, location of the airport, ground handlers, weather patterns, etc. It takes time and effort to tweak a security lane. ATL has a good handle on their passenger profiles. MCO... not so much. Largely, that's the TSA'a fault, but not ALL of it. In any case, it's sadly not just an issue of training (much as I wish it were that simple).