I've checked it on parking lot and even today (not intentional) while going to work.
on parking lot for example i drive straight and then make 90 degrees turn. I feel and even hear that asc is working. It corrects car's path, but of course with too high speed it needs driver corrections. While doing the same without asc car would make a circle.
Second test: on snowy road going straight i press the accelerator pedal to the floor and nothing happens
car slowly accelerates becouse of asc throttle nearly closed
the same without asc is quite dangeorus, wheels rotate too fast, car goes left or right
third test: diagnostic tool doesnt report any errors