Yes the game *is* playable by the media today - and I actually got a ten minute interview with one of the developers. I'll be distilling the footage into something useful in terms of info for the article I put up on it, and while we're at it, I was able to interview two of Insomniac's devs for five minutes each as well.
Luckily all my questions are all technical all the time.
PS - I saw the game played for ten minutes and then played it myself. I have a lot of good things to say about it in terms of the physics and other effects in play. The mud ruts stay throughout the entire race, all vehicles leave them, they effect traction on the track, and each vehicle is fully destructible with physics determining how the in-engine 'break-up' tosses the pieces around.
I'll expand more on it in my article.