From a friend of a friend at Langley research Center:

This is one pretty airplane ... talked to the Boeing pilot that flew this 787 to Farnborough and he told me the pilot from one of the Spitfires asked if the wing stops moving as it is carbonfiber and is one of the most flexible wings we have manufactured. He also said he could not hear the Spitfires from the 787 flight deck as this airplane is the quietest airplane we have yet designed.

Enjoy