Yes, I've knoticed MY brakes feel spongy at times, compaired to his. I was driving a '90 Jeep Cherokee prior to the AV. Just the difference in vehicle weights is tough to get used to. Then the AV rides SOOO much better than the Jeep. It just doesn't feel like I'm approaching a stop that quickly.
I've not manually checked the DIC's numbers, yet. But, my brother has to check his milage manually, over the same route, driving the same speed, and has gotten the same numbers. Based on that, I would say the DIC's calculations are fairly accurate.
Also, I forgot to include city driving milage. I consistantly get (according to the DIC) 14.5 mpg driving around town and to work and back. My "to work" route is not interstate at all. 2 and 4 lane roads for 12 miles, (oneway), with lots of lights and traffic. Again, my brother gets similar results, via manual calculations.