Posky 737-800 realistic turn - how did they do it?

Hallo :)Did a flight in the Posky 737-800 V4 and only just noticed something as the autopilot performed a turn onto a new heading after arrival at a waypoint. The turn was nice and slow......*very* gentle wing-drop, slow arc around to the new heading then a slow and smooth wing level-off - just the way it is in real-life :)Im sure many of you have got flight sim airliners that turn like F-16s. Had a look at the Posky aircraft.cfg but couldnt figure out what entries enabled this behavior!How did they do it! Would sure like to tweak my other planes to turn like that! Dont know about the rest of you but my 50North 737s think they are Sukhoi-27s in disguise....Looking forward to your responses.Oh ..nice work Posky :)