Yeah but it looks like the signature S is almost 100K, that's within range of the Karma. Hey I hope they do sell 20,000 but that's a lot for a car this expensive and this new.
Production of the 50, 60, 70k models are set to begin in November and December. At full production they expect to produce 80/day; which is 29,200 if they produced 365 days. Tesla states only 1000 signatures will be made, so my assumption is the remaining vehicles will be of the less expensive variety.
I don't believe the 50k model is a PR move as the biggest difference between vehicles is the size of the battery. Most of the other differences are options (selected at purchase), or cosmetic differences to the trim that vary with model, which shouldn't be difficult to change depending on demand.
The volt is a 40k Chevy Cruze with a fancy electrical system. Its reasonable to cross shop a Volt with a Prius, and as the Prius costs half as much the eonomics don't bear out for the Volt. Neither the Prius or Volt have anywhere near as much "sexiness" as the entry level Model S. I don't think its unreasonable to cross shop the Model S with other mid/full size luxury vehicles (3/5 series, a5, GS etc.), none of which have any exclusivity to them.
Seems to me that shatt is correct, if it's reliable, it will sell 20k units easily. Im interested to see what GM does with the Volt in 2013. If you can afford a 40k Volt, you can likely swing a 50K Model S. I'll go out on a limb and guess most current Volt owners selected the Volt over alternatives such as the Prius, for the ability to go all electric. Since the base model S gives you 160 miles vs 40-50 for the volt, I see early adopter market for the volt, which is already low, evaporating.