What Nissan failed to quantify was the steps many of us took to help alleviate the issues which led to "better" statistics that Nissan chose to use.
Again another "no option" decision. Thank you Nissan for letting me decide what is best for me!
The challenge for all of you that feel aggrieved is that the actual data does not support your argument. Nissan knows exactly how all of you quick charge, and how everyone else quick charges too, so No, they didn't fail to quantify your experiments because they were irrelevant in the larger data set of all 2018 LEAFs in the range of VINs. Each of you are just one data point weighed equally.
But what is relevant is that Nissan has the data that shows that of all the LEAFs in the VIN range do very few multiple daily quick charges. And they also know that an even smaller number of owners have gone to a dealer to have their car checked to see there is an issue with their car where multiple-daily charges are slower. On top of that Nissan has declared that this slowdown of charging is a part of an intentional battery longevity strategy to keep your car's battery from degrading.
Now, of this tiny group, how many of you took you car to a dealer to get your perceived problem logged?
As far as Nissan can tell, cars in the US don't have an issue with having a quick charge take a little longer than other quick charges, given that variability of charge times is a well established trait of quick charging.
Nissan does not think there is a major problem, they do know that some owners are miffed that QC's sometimes take longer, but they do know based on the data that the majority of their customers don't think it is a problem either.
So in the end, their battery safety strategy is working as designed, customers aren't seeing any issue, so what is there to fix?
Now it's obvious that some 2018 customers here on this forum think they have an issue, but other than complaining have nothing to build a case to support their argument, so if you think you have a case, build a good argument to support that case.
Now as disclosure, I have one of these early 2018 LEAFs, but in a year of driving the car, I've only encountered one QC session that was slightly longer than normal, so as far as I can tell there isn't an issue for me, and my LEAF is QC'd daily since there is a free quick charger a block from my house.
If Nissan decides to offer an update to make these edge case quick charge sessions 10-15 minutes faster, that will be fine, but it is not the end of the world if they don't.