it appears that they're placing the blame on the battery.
Media Circus
Dr. Jason Bloomberg, an overnight inpatient hospitalist at the Cheyenne Veterans Affairs Medical Center, drove his Tesla to work the night of Dec. 21 when an Arctic blast sent temperatures plummeting more than 40 degrees in a very short time.
He charged it up to 90% before he left for work and was down to 72% when he arrived. He lost 10% more range overnight during his shift. He lost another 10% more charge warming up the battery, but he had enough power to get home in the extreme cold.
Bloomberg also speculated that the Steavensons’ rental car was likely malfunctioning.
Whatever the case, he said that it’s not normal for a Tesla to lose that much range from cold weather. He gets irritated with the way such bad experiences are reported.
“If an EV malfunctions, then it becomes, in the media circus, emblematic of all EVs,” Bloomberg said.
Tesla battery data shows path to over 500,000 miles on a single pack
https://electrek.co/2016/11/01/tesla-battery-degradation/