The fuel efficiency numbers
The fuel efficiency numbers are not correct. If we assume that it takes around 30KWh for 100 miles, in California the electricity costs around 36 cents per KWh.
That is $11. Even at today's prices that is 2.3 gallons of 87 gas. My Honda Accord runs 30 mpg on average. 100 miles in a gas car will cost me $16.
In other words, an electric car that takes 30 kWh runs 43-44 mpg, not 100.
When gas prices are $2.50 (instead of $4.80 in my calculations), the cost of a gas vehicle is way lower - my gas Honda Accord would cost $8.50 / 100 miles, versus $11 for an electric. Also, keep in mind that you need to replace the battery for a huge amount of money when it is out of warranty AND the electric version costs more money to begin with, maybe 50% more. So, overall a gas car is way more economical to drive.