Most of my observations are from France, since it's where I live, but it should be correct for Germany, Spain, UK at least.
Plus :
* shorter distances
* higher gas price in EU than US
Minus :
* people usually commute by public transportation. In big cities, they don't even own a car. There is no place to park it, and it's kinda useless, since it take longer to go somewhere by car than by public transport.
* For medium distance (100~1000 km), people use both car and train. It's maybe 50/50, depending on the need of car at destination. You are always more independent by car, but by train you arrive quicker, and rested (a good rail network helping).
* On the 'social' side of things, the car ownership is not a thing the way it is in america (or is it a generation thing / Hollywood exaggeration, I don't know). European young adult buy a car when they need one, not as soon as possible to show they can support themselves.
RE: "* On the 'social' side of things, the car ownership is not a thing the way it is in america (or is it a generation thing / Hollywood exaggeration, I don't know). European young adult buy a car when they need one, not as soon as possible to show they can support themselves."
This used to be the case, but both car ownership and young adults obtaining driver's licenses has been on the decline for the last decade.
EDIT: LINKS! Because data.
http://www.theatlanticcities.com/commute/2012/10/end-car-own...
http://www.thedailybeast.com/articles/2013/07/05/young-ameri...
http://www.nytimes.com/2013/06/30/sunday-review/the-end-of-c...
In 2013, there were 12 million¹ vehicles registered in the EU out of 733 million people. And in the U.S. there were 15 million² sales out of 315 million people.
So it looks like Europe is buying cars at about a third the rate of Americans.
¹ http://www.nytimes.com/2014/01/17/business/international/car...
Also, when you look graph ², you can wonder how much of that is due to recession.
(found at random via google search, so I don't know how trustable it is, but seems legit. : http://www.calculatedriskblog.com/2011_12_01_archive.html )
¹ http://en.wikipedia.org/wiki/European_Union
² http://2.bp.blogspot.com/-gzzddTbQ7Mg/TtfoT07ehTI/AAAAAAAALe... (via ³)
³ http://www.calculatedriskblog.com/2011_12_01_archive.html
Nonetheless, your point is still valid, European buy less car per person.
Texas is roughly similar size as France.
http://mapfight.appspot.com/texas-vs-fr/texas-us-france-size...
Many luxury buyers have no interest whatsoever in electrics. buyers of Rolls are one such type of buyer. When Rolls trotted out an all electric and took it across the world owners of existing Rolls were not interested. Europe does produce quite a few 100k cars but they tend to be performance exotics, last I checked the main market is much further down stream and for much much smaller cars than the S (which is big even in the US)