They've been talking about the Volt for a few years now, I think a lot of people have heard about it. Without doing a google search, I'm pretty sure there was footage of Lutz driving the Volt to display how quiet it is, as well as how it was still pleasant to drive--maybe last year?
The commercials from GM have been pretty iffy lately; I'm not crazy about the Cadillac commercials at all; meh, the cars moving, so what? It's got wheels, that's what it's supposed to be doing. But I like a lot of the Chevy commercials, with the in-your-face comparisons with competitor vehicles.
I loved these sorts of commercials from GM:
http://www.youtube.com/watch?v=JxJ0hrbZkBE
as well as the G8 commercials i remember seeing:
http://www.youtube.com/watch?v=kHokcVWTOAo