BAe146-100 you bet they deploy the leading edges, it wouldn't fly otherwise! This configuration led to the incident where, as they turned onto the runway for takeoff, a passengering crew member (non A300 rated) sprang from his seat and rushed towards the flightdeck yelling 'Flaps, you idiots, Flaps!!' Huge embarrassment, of course, when it was explained to him, but what would you have done in the circumstances? With the knowledge of the above, I've flown as passenger on the A300 and it is most disconcerting to start the takeoff roll with no trailing edge flaps set, especially if you can't see the leading edges from your seat ... (However, any attempt to set takeoff thrust would cause an extremely loud warning to come from the Takeoff Configuration Warning - or whatever Airbus call it.)
Oh, and in case anyone 'thinks on', I wasn't the crew member in that incident.
