Your range should go up in proportion to the increase kwh. In your quote from musk, he says you should get about 6% more range with the 90kwh pack. Thats because 90 / 85 = 1.059 or about 6% increase. Now, when you purchase the range upgrade from 85Kwh to 90kwh, you should get this increase of 6% immediately. This number seems to vary, but let's say the p85d had a range of 250 miles. A 6% increase would give you a new range of 265 miles. So your range should have increased by 15 miles, from your graphic I think tesla indicated 13 miles. In going from 85kwh to 90kwh, a 2015 car should have gained 13 miles in range. All well and good. But now 2016 rolls around, and there's this new battery. People start reporting that this battery has 12 miles more range than the previous battery even though it's still a 90Kwh battery. Let's not forget that the 2015 battery has supposedly already given the cars the 13 extra miles that you can expect from a 90kwh battery. So with the previous 13 miles and the additional 12 miles the 2016 battery is providing, that's at total of 25 miles of increased range in going from 85kwh to 90kwh. This just isn't possible. At moderate loads on the battery, there just aren't another 12 miles in the battery that can be had by increasing efficiency by tweaking the chemistry of the battery.
If they just happened to do something at the same time that increased the efficiency of the motors for instance, then you might see this kind of increase in miles. But from your previous posts, It appears that the only change was this new battery.
