Seans talking out of his ass. The movie has NOT been rated yet, and Arnold himself said most likely r rating, because fans don't want to feel as if they are getting down a watered down version of a movie.
As for James Cameron, he wanted to do T3 right after T2, but the company that owns the rights went bankrupt. A nasty legal battle followed. Warner bros finally won the auction recently. By this time James was very busy with other projects. They decided they couldn't wait for him to have a clear schedule, as Arnold wasn't getting any younger. Arnold waited for a script he liked, and they made it.
Arnold is pulling out all the stops for this one. He got into shape once again (he looks awesome again), put a lot of time into the project, and even money. Fans, and newcomers alike will not be dissapointed. The terminator really is back.