Thirty minutes is ridiculous. That is not "rapid" ANYTHING.
To be fair, the electric model is that most of the time you'll top up overnight (OK, that raises its own issues), and the only time you'll need a charging station is if you're on a road trip, in which case a 30 minute refreshment and potty break every couple of hundred miles isn't such a bad thing.
If, however, there is widespread uptake of electric cars, then it will start to become apparent that, even with demand reduced by home charging, you need one hell of a lot of 6-bay superchargers to match the throughput of a 6-bay gas station (especially since people who e.g. head off for a meal are going to leave their cars plugged in for more than 30 mins). You'd need entire parking lots kitted out with chargers - which, in turn, is going to start needing extra infrastructure to get the power to the site (...perhaps they could run a generator off those nice big tanks at the gas station?
I know Tesla has a battery pack replacement service, but it really needs to be affordable and streamlined and not require expensive robotics.
I saw the video of Tesla's battery changer, and it certainly seems preferable to a 30 minute recharge. With the weight of battery packs, and the need to build them in to the chassis to save space, I think robotics is probably the only way. Also, its probably too soon in the development of battery technology to introduce a 'standard' pack - maybe a split system whereby part of the battery capacity is in a replaceable, standardised, pack, and the rest is built into the chassis...
NOBODY wants to wait thirty minutes for "rapid recharge." The money spent on this infrastructure should, instead, be spent on optimizing the use of hydrogen fuel cells. They are the ultimate battery and they don't wear out.
Except you can't refill your hydrogen fuel cell at home - so you're going to be straight in to the chicken-and-egg problem of needing the full refueling infrastructure in place before people buy the cars. Unless maybe you have a plug-in/fuel cell hybrid?
Lets face it - the ideal use-case for an electric car is as a and still need another one for long trips. I quite like the look of the BMW i3 (it would probably suit my purposes, as the UK range-extender version hasn't been gimped to suit CA law) but, again, you could buy 3 small city cars, or a fully tricked-out Mini with gold-plated hubcaps and unicorn-fur upholstery for the price of the basic model.
Meanwhile, I've done my bit for the promotion of electric vehicles and bought one of these.