No, JR has mentioned that he doesn't like to know when the finish is coming so he can call it with real reactions. He knows what matches are happening when, and the script covers every detail of how the show is laid out otherwise. He might know when a match should wrap up due to the time constraints, but he liked to have that real reaction. I believe he said it was more so on PPVs, which is where he doesn't even like to know the winner.