I've been following a multi-month discussion over in the r/electricvehicles subreddit about EPA range. There's a growing consensus that something is very wrong with it.
Here are a couple of the articles that got some discussion in that sub:
As someone who has owned both a Tesla Model X and one of the other EVs on the list from the first article, I can also provide my own anecdata that at freeway speeds Tesla routinely underperforms their EPA range rating, and by quite a large margin. Meanwhile at freeway speeds my non-Tesla EV routinely exceeds its EPA rating.
That's not to say that Tesla hasn't done an amazing job at maximizing efficiency in their cars. They have. Just maybe not to the degree that the EPA test would suggest.
Here are a couple of the articles that got some discussion in that sub:
https://insideevs.com/news/407807/eletric-car-real-world-ran...
https://www.caranddriver.com/reviews/a30874032/porsche-tayca...
As someone who has owned both a Tesla Model X and one of the other EVs on the list from the first article, I can also provide my own anecdata that at freeway speeds Tesla routinely underperforms their EPA range rating, and by quite a large margin. Meanwhile at freeway speeds my non-Tesla EV routinely exceeds its EPA rating.
That's not to say that Tesla hasn't done an amazing job at maximizing efficiency in their cars. They have. Just maybe not to the degree that the EPA test would suggest.