No, I think I understood your point, and the point of the second article. (Thanks for that, by the way, I wasn't aware that Tesla had improved battery performance by keeping them warm. A neat idea.) I just didn't write my response very well, and for that I apologize.
What I was referring to was mostly the amount of energy the climate control system uses. Heating the cabin is going to suck some juice. I've talked to Chevy Volt owners about their winter performance and they say heating is their biggest problem in the winter. Even with the gasoline engine running to provide some waste heat for the cabin, they still get 50% of their normal range if they turn the heat on. If they're OK with driving to work wearing thick gloves and a winter parka while scraping the ice from the inside of their windshield, they only lose about 20% of their range which I presume is purely due to cold-weather battery performance at that point. Elon claims in the second article only 10% loss due to heating the cabin which frankly I don't believe and am chalking up to "MPG benchmarking nonsense." I admit I could be wrong, but I'd have to see some compelling numbers.
I believe my main point still stands though, which is that the government of Norway has built up the infrastructure and given people incentive to drive these cars. This doesn't exist in Michigan. Chargemap.com says that there are 1,416 charging stations in Norway. According to energy.gov, Michigan has 700. Meanwhile, according to the population density map on Wikipedia (1994 was the newest I could find, sadly) almost all the population in Norway is condensed into very small areas along the edges. Michigan is all over the place (except for the UP, which is noticeably lower). Assuming they only installed charging stations where there are people, this means that while in Norway, you likely have access to a charging station wherever you drive, unlike Michigan. So basically, we're comparing apples to kumquats here and you can't just point to the popularity of Tesla as proof of anything other than Norway's government was forward thinking.