Scroll down to see what this Turok dev Turok_Tim has to say about PS3 and 360 versions, demo, co-op and more. Know that the PS3 game rocks as hard as the 360 version:
"PS3 - Issues with PS3 development are largely overblown by internet "experts" and folks with an axe to grind. Face it, any new platform is going to present challenges and the PS3 is no different from the 360 in that regard. We've had over a year's head start getting experience on the 360, but Propaganda has extremely talented coders who took on the challenge of making Turok multiplatform and giving PS3 owners the best game possible. Sony was also a great supporter, providing on-site assistance here so that you guys on PS3 got the same AAA fps experience that the 360 owners are going to get when Turok's released. So to make a long story short, the PS3 game rocks as hard as the 360 version. No worries there."