Macworld: First Look: Under-the-hood changes boost MacBook performance

see where the graph says Cinema 4D, then under that it says RENDER.

That means the test is only during a render operation, which does not use the 3d card ! (in an active and passive phase, when you design in 3d, the card must calculate the curves of the design and update 4 views in real time. VS. When you render, the 3d card is used to only calculate the 3d and create the frames_)

The 3d Card is used, during the actual design process.  Think of designing in c4d as playing a bad ass 3d video game (like call of duty 4)  If it can play the game, then it can design in c4d, and more importantly...you and i can sit in a coffee shop and play the software.