Strange as it may sound, CRUISE AT GREEN DOT SPEED is an option available on the Airbus, so YOUR cruise speed displayed on the CFP will depend on what your airline decided to use!
Other options are:
- Cruise at given K*Vs
- Cruise at given Mach or CAS
- Cruise at optimum speed
- Cruise at maximum speed
- Cruise at optimum altitude and given speed
- Cruise at optimum altitude and optimum speed
- Cruise at green dot speed
- Cruise at optimum and green dot speed
So its up to the airline to decide which they want to use.
Mutt