No. You will not get the "RETARD" auto callout if you have closed the taps by 20'. (Having landed an Airbus twice today I can assure you that is the case.)
Either your airline changed something or you need to pay better attention johnsmith:
Rio de Janeiro to Sao Paulo ENTIRE FLIGHT IN ENGLISH (43 minutes) - YouTube
In this case thrust levers are fully closed by 30ft! The airbus will call RETARD at 20ft.
FCOM:
RETARD ANNOUNCEMENT
The loudspeaker announces RETARD at 20*ft or at 10*ft if autothrust is active and one autopilot is in LAND mode.