Been in sales most of my life, and engineering the other parts. One thing that I have learned is "Under-promise and Over-deliver". This is really, really weak.
Also, Even though the cost is much less per mile in DOLLARS, it is much higher in TIME. Charging at even the most efficient Quick charge stations available today is likely to take you 20 to 30 minutes (from the time you plug in), AND as the demand for such things increases, you are going to see new tarriff rates and new charges for Electricity suppliers, as well as new taxes, as well as new regs for the grid reliability standard. Transmission and distribution costs will be affected, and in states like Cali, where we have already seen that they have issues managing the grid (see: brownouts), who knows what the extra demand on mostly off peak hours (when folks will be charging their car at home) will do to their situation. Trust me, the Electric companies are going to cash in. Another thing to think about is that Electricity prices on the open market are most closely tied to natural gas prices, and with the increased demand in electricity, natural gas prices will rise as well. Theres a lot more to this "electric vehicle" push than most people think.