I think the AF 340 crash in Toronto saw the cabin Crew do a great job and get every one off in close to 90 secs. No fire tho'-that would have been a horror story landing long and running into a huge ditch leaking fuel everywhere which then ignites-doesnt bear thinking about, But the point about the tests being done with pre warned staff no frail old people, young babies, pregnant mums, mobility impaired, panic, fire, smoke etc etc remains very valid