The current Model S, as far as I can tell, is in no way ready to do battery swapping in a reasonable amount of time. Could be, though; what do I know?
EDIT: now that I look at the link you added, I stand corrected. From the exploded diagrams, et. al., that I saw it didn't look like it could be swapped out in five minutes. Tesla's designers obviously disagree. :-)
And now that I view the link on a desktop browser, the one who posted it speculates that it's car sharing as well.
The phraseology "recharge your model S" leads me away from the notion that it's it's a swap, perhaps they've found some way to treat the batteries as super capacitors?
Elon alluded to it already: http://green.autoblog.com/2013/05/14/tesla-model-s-battery-s...