There are plenty of places in this world where they prolong the obviously required runway change until it's too late and then they force the aircraft already on final approach to continue with landing by advising exactly 10 kts tailwind, despite it's more like 15 or more when you cross the threshold.
From what I know, only the ATC reported wind is valid. Of course, it's good airmanship to briefly look at the wind indication on ND close to ground (but not at 500ft of course) - and to act respectively if major discrepancy is noticed.
FDR data was found to indicate that "the average tail wind component during the 15 seconds prior to initial touchdown was 12.95 knots"
Unless you floated during the last 15 seconds before touchdown, there is no way a normal FDM program would even mention this unless tailwind component below 50ft would be significantly higher than AFM limit. The AFM limitations are for landing, which in this case would count from screen height to touchdown - and that doesn't take 15 seconds.