Consider this infographic, titled "The Cost of Motoring Compared Worldwide" to be a guide of sorts for determining which nations should be quick to adopt electric vehicles.
Fuel costs alone in some countries, as seen below, should entice buyers to go electric. Then there's congestion charges, which most plug-ins avoid. Parking fees, again in some nations aren't to be paid by electric vehicle owners. Some auto insurer even offer discounts on EVs. There's even that road tax or gas tax.
Overall though, we feel this infographic provides a significant amount of useful information, especially when trying to guess which nations would benefit most from leading the EV charge.