It proves that the traction control of the car can distribute the power well between the wheels enough to climb a wet, uneven and off-balance surface. There are plenty of offroad scenarios which this would do well in.
Volvo's Traction Control System (TCS) is one of the best in the industry. It can distribute the engine power between all four wheels very well in wet and slippery conditions like this.
You've demonstrated your ignorance. This test simulates lots of possible conditions experienced when driving off-road in poor conditions to an extreme. Most modern SUVs would miserably fail such a test even many 4WD drive models.
Given one vehicle began using said parts before the other, it would grammatically and logically make sense to be that way. Thanks for the illogical input.
