I've looked and can't find anything to support that (but the internet is a vast place).
2011: Tesla Gigaom
Tesla has designed its second electric car, the Model S, to have a battery that can be quickly taken out and swapped with a new one, with the idea that if battery swapping becomes common for electric car drivers one day, the Model S will be prepared, explained Tesla CTO JB Straubel at a tour of Tesla’s Model S Alpha Build room on Thursday. Think of it as Tesla hedging its bets on whether battery swapping will become popular one day or not.