I don't pay for power now (solar power system) but in general:
Standard SDG+E DR rates:
6 cents to baseline
8 cents 100-130% of baseline
17 cents over 130%
In my previous house I used about 12kwhr/day, which was about baseline. (Baseline averages about 14kwhr/day - more in the summer, less in winter.) If I started charging an EV and I took 24kwhr additional per day (i.e. did an almost complete charge every day, which is unlikely) it would cost me 12.4 cents a kwhr on average.
If someone uses more power nominally they'll pay more per kwhr - if they use less they'll pay less per kwhr.
But you use far less than the US average per day so I don't think you are a reasonable metric.
The EIA on the other hand pegs the average retail customer in California at 15.29 c per kWh, and based on that tiered pricing the issue for many could be even worse as the additional charging of a EV could likley be at the highest rate.
http://www.eia.gov/electricity/monthly/epm_table_grapher.cfm?t=epmt_5_6_a
Efficiency for the LEAF charger has been hard to nail down; it is likely between 80% (one user's estimate based on meter readings) and 94% (efficiency of a similar commercial charger.) Your numbers suggest an efficiency of 89% so let's go with that.
So a 24kwhr Leaf battery takes 27kwhr to charge. That's $3.34. Divide that by range (say 73 miles per your numbers) and that gives us 4.5 cents/mile. (again just mileage energy costs.)
My bad, I used the 34 kWh/100 miles as the battery size.
Your right its 24 kWh, or 27 to charge
So at 15.9 C its 5.9c per mile.
?? I have one. It has a range of about 550 miles. Nice but far from unlimited.
Unlimited in the sense that there are always refueling stations so you can drive it anywhere and not worry about their availability. A real concern for CNG and 220V outlets.