It is ridiculous that the NHL or some advanced stat outfit doesn't keep offensive zone time. I think NHL.com used to keep it years ago but I'm not sure about that either. Anyway, I thinks SOG are very telling regardless of where they came from. When a team dominates shots on goal, they are 99% of the time dominating the game. After all, the goal is to shoot on goal and try to score. When a team is taking a shot on goal it means they have the puck, which means the other team does not have it and it really is that simple. If they did keep offensive end time, I would bet anything that it would very much correlate with shots on goal.