146 - You are correct about JNB! More than once, I have heard the flight deck warn of the length of take off roll. Then pax do not get so concerned when they have been trundling for one minute ... the terminal buildings have all passed by ... the outer apron has gone by ... and (Yawn) the cargo terminal has gone by ... and then you can see the main Pretoria Highway ...
The climb out over Pretoria and away to the North is usually very slow on any of the carriers. This is also why the European flights all leave before 10:00 or after 18:00, in the middle of the day, they would have to run on from 03L and use the Pretoria highway as well.