The A2 supports 9 differentmotor configurations.  Which of these configurations will allow themulitcopter to continue to fly if power from one of the motors is lost?

There is a video clip of this feature using an S800 in the demo.  Isthe X6 (Hex V) configuration the only motor configuration that will tolerate amotor failure and continue to fly?  There is no clear statement in the users manual or anywhere I can find concerning this feature.  I am even a bit suspect about the video demostration.  I think that same clip was used when this capabiltiy was introduced for the WKM, before the A2 was avaialble.  

a hex and octo will fly fine with out 1 motor but a quad will crash

Hexa-rotor and Octo-rotor can support the one motor lost protection.