A related thought: I can't think of a better place for Level 3 DC Fast Chargers (both CHAdeMO and SAE Combo) than an airport cell-phone lot. In and out in 30 minutes. Lots of turnover. Lots of monitoring of lolly-gagging, regardless of engine type. The spots would need unambiguous signage and asphalt paint for the DC charging spot. In EV friendly states such as California and Maryland and several other, the airports could get the hardware at a heavily subsidized price. In Maryland, it's 50% off. They're serious about a robust DC infrastructure across the state.
If there were a few DC spots at the cell-phone lot at BWI airport, I could drive the ~50 miles to pick up family, even in winter, no problem. (Well, I'd keep the speed down.)
The MEA is supposed to announce locations of its DC Fast Charging Network soon, maybe this week. http://energy.maryland.gov/Transportation/evip.html