I know it's anecdata, but I found the dashboard estimate on my VW (heh) strangely correct. It's off by +/- 5% in most cases. Since it doesn't take upcoming traf

I know it's anecdata, but I found the dashboard estimate on my VW (heh) strangely correct. It's off by +/- 5% in most cases. Since it doesn't take upcoming traffic/terrain/wind into account, I find it more than reasonable.