I'd like more real-world data like that too, in particular in cold weather areas like where I live (Alberta, Canada).
In my opinion electric cars are ideally suited to cold climates and are superior to combustion engines, contrary to what most people perceive. One reason being you don't have the terrible cold weather starts which are hard on a combustion engine, and produce excessive pollutants as the engine runs inefficiently when cold. The other thing many people forget is that regular combustion engine vehicles need to be plugged in during cold winter months too!! So in addition to the fossil fuels that are inefficiently burned, they also consume electricity for block heaters.
Electric cars require no time to warm up, no hard cold starts, no idling and waiting for it to warm up. The electric car is ready to go immediately, and you get instant heat as the source is electric! This is ideal for cold climates, while everyone is waiting for their cars to warm up and listening to the sickening groaning and rattling at extreme cold startup, an electric Leaf owner could jump in and drive away immediately with the heater ready to go within seconds. Yes the batteries will have reduced efficiency and reduced range when cold, but all combustion engines have the same problem!! In winter combustion engines are much less efficient and you get significantly less range on a tank of gas compared to summer time, so it's really not fair to critisize electric cars for a limitation that all cars are guilty of.
Another great benefit for me would be the ability to warm up the car in my attached garage without filling it and my house with fumes, and not having to run my two kids through the gauntlet of polluted air as they make their way to the car. In the morning, with the car still plugged in, I could turn on the heater to warm up the interior slightly, then walk out to the garage and breath FRESH AIR as I get both kids into their seats while the heater continues to run. Then I walk over and unplug the car, the cabin is heated with power from the wall outlet and the battery should be close to or at 100% at this point, and the air quality is still great. My kids will not have breathed any exhaust from a cold idling car, and we're ready to take off anytime without wondering if the engine has warmed up yet.
Electric cars in my opinion would be ideal for the Canadian winter that I live through each year, and my kids lungs and overall health would benefit.