Just read this: http://www.carmagazine.co.uk/Drives/Search-Results/First-drives/BMW-i3-2013-electric-car-test-ride/?content-block=0
Pretty impressive performance. One report say's 0-60 in 7.2 sec and the other in 7.3 so it sounds legit. The writer was even more impressed with the handling and concluded with this:
"The i3 is shaping up to be a breakthrough electric car. It delivers dynamic thrills like no electric car before it. The steering seems highly involving, the drivetrain’s punch would flatten a Leaf, and the handling and road-holding seem up there with BMW’s best. Ulrich Kranz and his team appear to have succeeded in bringing pure driving pleasure to the environmentally friendly car. We’ll know for sure when we drive the car in summer 2013."
If they keep the price under 50K with the range extender before the $7,500 federal Tax credit then I suspect they are going to sell a lot of these.