http://www.mcmansionhell.com/post/148669026046/notes-on-atta...
I think the author is fully aware of what you've just said: "To be completely honest, the garage is a necessity in America, and to be even more honest, it’s very hard to properly incorporate a garage into a smallish house without there being some kind of architectural awkwardness."
NB This is in the area of Perth/Fife in Scotland.
When it's -40 out, it's exceptionally nice to know your car will start, and you didn't have to plug in three 1000W heaters 5+ hours beforehand.
-45F is common overnight.
Up there, we have a block heater, battery blanket and oil pan heater - MINIMUM. If you've got a diesel you want at least two oil pan heaters, three if they fit!
Also note there are millions of people living in colder conditions than I.