As part of my service to FT and ensure that accurate information is provided, I decided to do a field test.

I arrived on UA around 1 a.m. into T7. There were a number of cleaners/security types in the terminal to make sure everyone exited into the baggage claim area. They were also doing a test of the fire alarm system (strobes and sirens) so sleeping in the terminal would not have been an option.

I took the AirTrain over to T4 and found my way over to the food court at the arrivals level. There is a Peet's Coffee there that is open 24 hours and found a padded bench in the adjacent sleeping/seating area. There were about 30-40 people in the general area hanging out. There's some overnight construction going on in the terminal right around the food court involving jackhammers so sleeping wasn't in the cards for me.

Took the AirTrain back to T7 around 4:45 a.m. to check in for my flight and hang out in the lounge which opened at 5.