I don't mean to hijack the thread but I have similar question regarding real world range. The site saids Performance / Long Range AWD is 322. So if you were to charge to full or 80%, then driver 150 miles locally. Would you end up at the same or very close to the level as driving 150 miles on the highway before recharging again? I'm specifying 150 miles because I think that's a reasonable driving time on the highway for most people. I understand that the regenerative braking is supposed to offset the loss in repetitive acceleration to certain speed since acceleration to that speed consumes more than maintaining.
We typically call the indicated range, the "guess o' meter" (GOM) because there is some variability that increases at values over ~30-50 miles. But if it says "150 miles," it will in urban driving, give you that 150 miles, with +/- 15 miles, due to weather like cold, under 50 F, heat, over 85 F, rain, or snow.
The recommended practice is to limit the car charge, a percentage, to give regeneration "head room" for braking. In my case, the ~236-240 mi range, I charge to just 66%, ~154-160 miles to maximize regenerative energy recovery from braking. This is more than enough for driving around town yet I can reach the nearest Superchargers to the North, East, South, and West. I only fully charge the battery over night when I plan to drive a long distance the next day, to the Superchargers beyond the nearest ones.
For long distance, I typically add ~30 miles reserve to the next Supercharger distance. Then I adjust the highway speed to keep the reserve and avoid going below 10 miles remaining. For example, I'll typically get behind a truck, RV, or trailer and use dynamic cruise control to keep a safe following distance to seer around road debris.
Bob Wilson