CZeroOwner, thank you very much for the plots - always fun to look at numbers and see how data is presented.
First off, as you know the predictions are based on a moving average of the consumption of the preceding 24km (15 miles), excluding heating/aircon usage. Although heating reduces the displayed RR by approximately 20% and aircon by about 10%, it's my understanding that the actual consumption does not enter into the predictive algorithm.
As we all know, variations in speed, altitude, head/tailwind, leadfoot vs. featherfoot, etc. can dramatically alter our consumption and thus, eventually, the RR display. In my case, I've had full-charge RR variations between 40 miles to over 80 miles.
That said, I rely on RR as simply another datapoint, mentally compensating knowing the conditions I had driven in for the past 15 miles. I feel that the consistency of our display makes it certainly better than whatever are the convoluted algorithms in the Leaf and Bolt GOMs.
Having a GPS in front of me with the destination dialed in on any longer trips makes it very easy to compare the RR with the GPS distance to destination and as long as RR is larger, no problem. It's especially valuable at the lower end of the scale, although I have personally never seen zero RR nor turtle.
Best at predicting is the Tesla, which is uncanny in very accurately predicting the remaining SoC at the destination over incredible distances after one enters the destination into their nav system! I's my understanding that their algorithm takes into account many variables, among them being speed over that particular stretch, altitude, interior temperature, exterior temperature, and (I was told by a Tesla rep) headwinds/tailwinds anticipated over the course. Notably, it does NOT take driver's past performance into account.
EVs: Two '12 Wht/Blu SE Prem., '13 TeslaMS85, three 156v CorbinSparrowsLi(NMC), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab96
Hybrids: 48v1kW bike
Mothballed ICE: Orig.Owner '67 Saab96V4, '88 IsuzuTrooper; '76 MBZ L206D RHD RV