Exit in 90sec tests are easy to rig. You either use USAF cadets and lots of practice until you can do it once (Boeing) or accept a couple of broken legs (Airbus

Exit in 90sec tests are easy to rig. You either use USAF cadets and lots of practice until you can do it once (Boeing) or accept a couple of broken legs (Airbus) Payload probably isn't a problem - this would be used on 90min commuter hops where a 737 doesn't need to carry it's full 5000nm range fuel load. If you put the seats facing backwards they would probably be safer than regular seats where people either submarine out of the lap belts or smash their face in the seat back in front of them.