The A320 range doesn't have the feature you mention 747. We just apply derated TO thrust at brake release and maintain it until AA at which point we throttle back to calculated climb thrust.
Gusty: as I understand the A340 is a remarkably fuel efficient aircraft but grossly underpowered resulting in very poor climb performance when heavy. As it's also designed for optimum fuel efficiency it cruises around Mach.76, whilst the Boeings I think can cruise around M0.86. That said, with 4 engines the A340 is unaffected by ETOPS regulations which restrict the 777 on some routes. Also the A340 can be flown on a virtually common type rating with the A330 and A320 series, saving a vast amount in airline training costs. Id like to see someone current on the 737, 757, 777 and 747 simultaneously! As for the 777 being the aircraft pax prefer, well I suppose that depends on which pax you ask! I think most of them don't care as long as the seats are comfy and they can get a drink!
