Yes, I think he was right...On the whole, that is. I can personally say that while not every asian is incompetent at driving, the majority are.
For instance, today I saw an asian who had been involved in an accident with a truck. The truck was turning left at an intersection (not a main road thankfully) and so had to use up all the road to turn. The asian ignored what was in front of him and tried to turn left at the same time. He ended up being sandwiched between the kerb and the truck. Luckily, no-one was hurt.
The things I notice about asians when it comes to driving, particularly when there is a moderate to heavy amount of traffic, is that they lose confidence and concentration.
Just because you have a full licence does not make you competant. I term competant by the capacity to react positively and decisively to any situation that pops up. it also means to be acutely aware of your surroundings - like knowing whether there are cars around you, and what they are doing.
I see too many people, and not just asians, on their full licences and fail to have any confidence driving a motor vehicle.