The power drain argument against electric cars is very weak, solutions have already been determined.
All that's needed is to have the cars pull their power at times of lower load, which is during the night. They also could use the car batteries to reduce the peak load (around 5-6pm I think?), which would help the electric industry, as the peak load the lines have to be designed for won't be as high. No links, as it's something I saw ~5 years ago on television.
Is it weak? Is the electrical infrastructure and its carrying capacity uniform nationwide relative to current demand? I don't know what the numbers are, but it seems reasonable to presume that on a hot summer night in southern California demand might not fall to far from capacity now. And given that our entire economy, rightly or wrongly, is predicated on a premise of growth one tends to expect electrical demand to follow an upward trajectory even in an absence of electric vehicles - assuming: the economy itself is healthy and no alternative form of energy has displaced electricity's share of the energy market. that in turn suggests that anywhere where the electrical grid is operating during any part of the year at peak capacity, an increase in demand represents a problem in demand of a solution. I don't dispute that those solutions do exist, simply whether or not they are already in place. The premise of the article above was that fossil fuels had reached a tipping point, and the author makes a strong case regarding coal - but there remain significant sources of carbon from fossil fuels that in my view have yet to see a down turn in demand of any meaningful significance.