They tested recent models of i3s, Bolt, S75D, e-Golf, and Leaf
https://www.aaa.com/AAA/common/AAR/files/AAA-Electric-Vehicle-Range-Testing-Report.pdf
Main takeaway: resistive heating is a killer (we already knew that)
But it's a rigorous analysis and there are a bunch of interesting sidelights, such as the difference in range between the different testing modalities and between different vehicles. For example, figures 29 (Bolt) and 41 (S75D); green bars are the controls: driving at 75F w/o HVAC