That's incredibly pessimistic! So much so that I have to provide a counter.
My 4BL Leaf (this car is on it's way to 2BL) didn't even perform that poorly.
You do understand what "worst case" means, right? If we told people that because we get great range per bar then they will too, we wouldn't be helping them.
Thanks Leftie for helping there. yes, I meant what I wrote. Since the OP has “303” in his name, the linked car is in CO, and the car was tested in freezing temps, I thought it appropriate to cite REAL world WINTER temperatures as the WORST case. You (Leftie) obviously understand because you’re located in NY, but Stanton (located in Plano, TX) obviously doesn’t know what COLD really is. BTW, when I moved from WA to Denton, TX, it took me THREE winters to finally turn on the house heater, so don’t tell me that your “blue northers” are “cold”. So yes, 20 mi range is possible to the uninitiated, especially when cold-soaked over many days/nights at zero.