It's just a question focusing on is the signal reception based on wind samples relevant or not? There just appears to be a guilty verdict regardless of the evidence relevence
I guess your point is that ISS Reception according to the Weatherlink help file is
The ISS Reception rate shows the percentage of wind data packets that have been successfully received by the Vnatage Vue, Vantage Pro or Vantage Pro2 console.
[The "Vnatage Vue" is Davis' typo.]
Someone can correct me if wrong, but I think they specify wind packets because they are updated and transmitted the most, every 2.5 seconds. As I understand, other variables aren't updated so often. However, as far as I can see, and apparently everyone else here seems to see, if wind packets aren't received, then no other packets are received either, and if a packet is received it will contain wind. In short; every data transmission contains a wind packet, and if a wind packet isn't received no other data is either.
If the question has to do with separate wind stations, I have no personal experience, but as far as I can tell the ISS reception in WL is based on the ISS and doesn't show for other stations, though on the console in diagnostic mode I can see the reception % for other stations by pressing the "Station" button.
If the question is about how extra stations can affect the ISS reception, it can lower it a bit. On the post where I posted my graph (post #97), you can see a slight decrease in ISS reception around the evening of January 17th, it corresponds to when I powered up an extra temp station I use to monitor water pipes when we get cold spells.