I know someone on one of the teams testing them. It's basically the last line of testing before they go to mass production for consumers. He let me take it for a spin, pretty nice car. I wish it was coming out sooner but I'll just have to settle for the Fiesta instead
Anyway, they've been on sale in Europe and elsewhere for a while, so it's not like we can't see versions of them or get details from drivers and car reviewers to find out how they handle and such.
You'll be seeing mostly white Sonics until they launch. Right now they are only testing in two colors. Can't remember the second color off the top of my head.