I own a Chevy Bolt in Maine and the figure listed in this article is far off from what I have experienced over several winters here. At a temp of 20 F my bolt loses ~20% of its range from the EPA estimate, going from 236 to about 190miles of range. Conversely, my friend owns a Tesla Model 3 up here and his range degrades severely during winter on the order of 30%.
edit: He owns a Model 3, not a Model Y.
The temperature today in my area varied between 9 F at 9AM and 25 F at 3PM. My girlfriend happened to need to drive to several different towns/cities for her work so her total trip was 135 miles. Our Bolt says it has 50 miles left.
I only charge to 90% and just received a new 259 mile range battery as part of the Bolt recall. So the EPA range of my Bolt at 90% charge is 233 miles. If we take the Bolt's 50 mile left range claim at face value (which I have found to be overly pessimistic), then it got 185 miles of range today out of the expected 233, or a ~20% drop in EPA stated range.
So I just don't believe the numbers provided in the linked article. They are completely out of whack with my every day experience owning a Bolt through three winters in Maine.