No Uncharted 2 demo

According to Kotaku, there wil be a demo for Uncharted 2; however it will be a multiplayer demo. Alas no single player demo. That disappoints me because I probably will never play this game multiplayer. I use demos to gauge whether I want to buy games or not, primarily whether I'm on the fence about a game or not. In this case, though, I don't need a demo; I was going to buy this game regardless because I liked the first Uncharted. At least single player is supposed to be longer.