since corvette and other modern vehicles are using them, why change ours? and this explanation left me scratching me head. translation needed

"Hotchkiss drive transfers the torque of the output shaft to the differential. No wheel drive thrust is sent to the drive shaft.........The torque tube drive shaft is used if the drive shaft has to carry the wheel drive thrust. Drive thrust is sent through the torque tube to the torque ball, to transmission, to engine and finally, to the frame through the engine mounts. That is, the car is pushed forward by the torque tube pressing on the engine."

doesn't the hotchkiss do the same pushing but without the tube? it's all connected except there's no tube connection from diff housing to trans housing. how is one pushing the vehicle forward but the other isn't?

http://www.innerauto.com/Automotive_Systems/Drive_Train/Drive_Shaft/