Don't take it too seriously. All I'm asking is; are you really jeopardising the a/c landing with a 'suspected' 13kts tailwind instead of a supposed limit of 10kts on a sufficiently long runway?
Remember this extra 3 kts people are talking about is derived from the FMC while still above flare height. If ATC said it was 13kts then the approach would become a discussion time even before it commenced.
This is really about the perceived safety v practical argument of GA or land decisions being made at very low level.
I suspect it will become an eternal circular discussion with no clear answer and up to the individual on the day. However, there seem to be some CP's who have devised an SOP to consult the magic box at DA; and some who have made it up themselves.