I really think that GM isn't doing itself any favours with these frequent pre-production mini-tests. Greg, who was able to 'test' it, did just a short drive on a one-way street... whats the point of this? You get bits of information, which ends up raising more questions than answers.
IMHO, of course, GM would be better served to do this sort of test once the production versions are ready to roll (May ??), then lets see an extensive test in real world conditions.
I for one am already tired of hearing about the Volt and its still a year or so away from real production. I hope GM does get this right - i would be interested some day in a commuter type vehicle like this, but not for $40K.
One thing I noticed at the Auto Show last week was people's reaction to the Volt. I wandered around the area where the Volt sat, and just watched reactions... there weren't any. People passed by it and hardly gave it a second glance, like it was another Malibu or Impala. The Camaros were getting noticed, but the Volt might as well been invisible.