[siphor]

not really offsetting, (according to this car review site anyway http://www.motortrend.com/roadtests/alternative/1208_2012_te...) at the end it has a little breakdown...

"During our drive, we used 78.2 kW-hrs of electricity (93 percent of the battery's rated capacity). What does that mean? It's the energy equivalent of 2.32 gasoline gallons, or 100.7 mpg-e before charging losses. That BMW 528i following us (powered by a very fuel-efficient, turbocharged, direct-injected 2.0-liter four-cylinder engine) consumed 7.9 gallons of gas for a rate of 30.1 mpg. The Tesla's electrical energy cost for the trip was $10.17 (at California's average electrical rate); the BMW's drive cost $34.55. The 528i emitted 152 lbs of CO2; the Model S, 52 -- from the state's power plants."

[sliverstorm]

No, not completely offset- partially. I don't mean I expect it will cost an electric car just as much to drive as a gas car; I mean that the falling costs of electricity storage cannot be taken in isolation against the rising cost of gasoline. Let's not forget as well that if everyone is suddenly driving electric cars, electricity demand will explode and prices will rise. I expect the result is simply that it will draw out the "crossing point".

Really, that's all I'm arguing, is that we are not twenty-four months away from the electric car takeover. It's probably more than a decade out.

[confluence]

We agree then - that's what I said - one decade to mainstream.