Managed Nav, I've not flown the A320, but assuming G/S Mini operates the same way that it does on other fly by wire Airbus types, then it should not carry 'excessive speed' to the threshold. The (G/S) minimum speed is VLS plus 1/3 of tower headwind component as inserted in the Perf page). Below 400 feet the target speed will be Vapp plus 1/3 of the current headwind minus 1/3 of headwind as inserted in the Perf page. Thus if the wind is the same, there is no extra speed carried. If there was a difference, then I guess you might expect windshear at the latter stages, which is, after all, one of the beauties of the system, it will protect you to a certain extent, by keeping energy on your side.