In case you missed it, there has been a playable Gran Turismo 5 demo available for download since October. If you have a Playstation 3, we'll assume your thumbs have been bleeding since then. If not here's the intro video. Pretty would be an understatement. If the GT5 trailer we brought to your eyes last year was just sip of the full game, this one is a Big Gulp of Jolt Cola. The game that always falls like manna from racing-sim heaven is already out in Japan, but we have to wait till February 19 for the full version of Gran Turismo 5 Prologue to hit the US.