I compared this trip stats with my trip in February. As expected, efficiency improved from 15.6 kWH/100 km to 14.3 kWH/100 km (9% improvement)
Rankian BMP recently shared this with other enthusiasts:
Last 2 days, I was on the highway traveling from my Home in Hyderabad to In-laws place in Thiruvananthapuram. Usually I set ACC at 100-105 kmph and occasionally touch 110 during overtaking. This time, I wanted to test the efficiency improvement on lower speeds so set ACC at 85 kmph and crossed 85 at 1 or 2 occasions. For the uninformed, Hyderabad to Thiruvananthapuram route is mostly through NH-44, a divided 4 lane highway with moderate to high truck traffic. Crossing Bangalore and Salem can be nightmarish if you happen to reach there at the wrong times. The last 100 km to Thiruvananthapuram goes through several villages through very congested roads.
My trip in Feb cost me 18 kWH of energy more than my current trip. Traveling at lower speeds definitely was less stressful since there are less number of lane changes. Attached is the detailed report of both trips, comparing same segments can give very useful insights.
Overall, I feel that using a lower speed in the highways, though it may lead to more travel time, it will be compensated lower charging time & money. 
Check out BHPian comments for more insights and information.
