Your predictions for electric-car growth: Twitter poll results

Tesla Supercharger site in Vacaville, California, before expansion    [photo: George Parrott]Predictions range all over the map on when electric-car sales are going to take off, depending on whether you're talking to a Wall Street bull or bear, what happens to gas prices, and even who's in office. With that in mind, we thought we'd ask our Twitter followers with an interest in electric cars how soon they think electric cars might become...