34th America's Cup, Yachting World article on what was changed on Team Oracle USA's AC72 catamaran to boost performance

From the following article on Yachting World:

http://www.yachtingworld.com/blogs/matthew-sheahan/535348/america-s-cup-what-was-changed-on-oracle#YsHlt3Zm1c8uiLxU.01

Having remained in San Francisco for a few days after the end of the event, I got to speak to a number of people about what was really going on. It didn't take long for the real picture of what was behind the speed improvements to emerge.
Oracle's jump in performance half way through the America's Cup is still the subject of hot debate, particularly among the New Zealand press who are convinced that the black cat had some special device that allowed them to foil more effectively. Was the ‘Herbie', as it became nicknamed, legal? Would Team New Zealand take legal action?

The speculation should have been brought to a halt after team boss Grant Dalton confirmed on Saturday that the team would not be taking legal action over the alleged device. But the chatter still goes on.

Read more at http://www.yachtingworld.com/blogs/matthew-sheahan/535348/america-s-cup-what-was-changed-on-oracle#DipgiVHciyumVLLB.99