There was never any doubt that pilots can increase upto 15kts in gusty conditions. We were talking about nitpicking a few knots for the heck of it.
Firsty ferret and enzino see below:
FCOM 22_20-40-10 OPTIMISATION
The FMGC uses the performance model and either the predicted landing weight or the current gross weight at transition to the approach phase to compute approach speeds (VLS, VAPP, F, S, Green Dot).