How efficient is the Audi R8's all-wheel drive system?

I've heard that the Audi R8 has one of the best all-wheel drive systems in the industry. Can someone explain how it works and what makes it stand out from other AWD systems in the market?

Audi's Quattro all-wheel drive system uses a center differential to distribute power to all four wheels, providing excellent traction and control in all weather and road conditions. Other than that, its electronically controlled torque vectoring feature helps to improve handling and cornering capabilities by selectively braking individual wheels.