“That’s because an EV’s operating range on a charge can be diminished by an average of 57 percent based solely on the ambient temperature, according to the results of a study conducted by the AAA Automotive Research Center in Southern California. That could leave, for example, the owner of a Nissan Leaf with an EPA-certified range of 84 miles with a depleted battery after driving a mere 36 miles in cold weather.”
http://www.forbes.com/sites/jimgorzelany/2014/03/24/the-cold-truth-icy-temps-can-slash-an-electric-cars-range-by-more-than-half/
I'm glad you brought that article up. It is based on a AAA study that was done on three electric cars: “The average EV battery range in AAA’s test was 105 miles at 75°F, but dropped 57 percent to 43 miles when the temperature was held steady at 20°F.”
In order to come up with his “36 miles” for the Leaf in cold weather, the author of the Forbes article made the mistake of applying the 57% range drop to the more “average” EPA range, rather than the more ideal 105 mile range at 75°F, like AAA did. In other words, the EPA range already takes into account some of the temperature drop, while the AAA study was comparing the high-end range to the low-end range.
Many Leaf owners, including ctdonath2 in post 47, frequently get that 100+ mile range. That is the starting point for the 57% reduction, not 75 miles (or 84 for newer Leafs).