I don't think that C/B's win was a super-suprise; the two teams were within about 2 points of each other at Worlds; clearly any major mistakes by W&P or improvements by C&B could make a difference. As it happens, there were both. W&P had a fall, and C&B got level 4 on their twizzles in both the FD and SD. At Worlds they only received Level 3.