For me the frustrating wait whilst the autobox on my Mercedes responds to the instruction to change from forward to reverse or vice-versa.
If you are executing a U-turn in traffic (it is a large car despite its good turning circle) it seems to take forever to make the transition. My VW was a lot faster in making the change.
Its not 1 - pause - 2, its is more like 1 - - - - pause - - - - 2
getting in and out of parking spaces must put my blood pressure up a couple of notches.
How old is the car, or more to the point the GearBox, as hit done lots of work?