Look, this is getting out of control. The article said that they were considering producing a cheaper 20 mile version in the future. The 40 mile Volt is still happening first. It's just a possible option for the future. They're not down grading the Volt's performance goals at all.
I think it's a great idea. Build two identical cars but one has a 16kwh battery pack and the other cheaper one has a 8kwh battery pack. The savings on the 20 mile version would be pretty substantial and make the car with in reach of a lot of folks who might otherwise skip it and buy a Prius or something, and of coarse for some people 20 miles is enough. Then, at a later date, the guy who bought the 8kwh battery could trade in his battery for the 40kwh battery along with a software download if he feels he needs more EV range. It's just options folks, that's all.
"Beer, the cause of and solution to, all of life's problems." -Homer Simpson