[Kevin Sharpe]

Tesla Motors launched the Model S with three battery options—40, 60 and 85 kilowatt-hours. The 40-kwh pack was dropped last year before it ever went into production, because only five percent of buyers were opting for it. That says something interesting about Tesla, since consumers were saying no to the cheapest point of entry. In fact, surveys I've seen show buyers opting for the most expensive, 85-kwh pack over the 60.

http://www.plugincars.com/it-works-tesla-ev-buyers-should-get-battery-pack-size-options-129678.html