what vehicles are you using for this comparison? I was surprised to see that a base model 3 weighs in the same ballpark as a 330i. however, a model s weighs >500 lbs more than a 540i, and there doesn't seem to be anything in the corolla size class that's even close to 3000 lbs.

I suspect that if this is true, it's only because the most popular cars in the US are so large that the battery weight doesn't matter as much.

US already have insanely big cars, though. So very different than in other markets.