The claim was around saving money vs. a Civic. You're going to have to assume a lot of miles (and make favorable assumptions about long-term maintenance) to make the numbers work. I have nothing against EVs but they're generally not a good purely financial decision for most people today.

[ADDED: The mass-market Tesla is going to still be a premium vehicle relative to other options. There's nothing wrong with that. But it's unrealistic to expect that crunching the numbers the right way will make Tesla the optimal financial decision for everyone.]