Would be interesting to see the timelines based on just people evacuating versus people trying to take their personal gear and evacuating. What is the time penalty? The test should be done with volunteers but each person only allowed to participate in one trial of either type of evacuation. No training beyond the standard briefing given to every passenger on each flight. Even then the evacuation would likely be quicker since the people involved know what is going to happen. Maybe through in some obstacles like broken seats, heavy smoke, jammed hatches.