Well... Is it unfair to summarize it like this? Tesla wanted to offer leasing from day one, but given the fact that they are still small and new in the business, and the Model S is such an extraordinary car in every meaning of the word, they could not get any bank behind it. Thus Elon saw fit to back up the Model S' residual value with his own money, which finally convinced some banks to at least do financing with Tesla. Since they wanted leasing in the first place, they called it leasing and emphasized the advantages of financing over leasing at the same time... Is that it?
Sounds about right, and explaining it that would probably would have gone over better than the games they're playing.