To be clear, IMO, pointing the racquet face to the side fence is the simpler, more repeatable, approach. I'm not sure why so many pros, and juniors, turn their racquet faces to the back fence on the backswing. But, it seems ubiquitous. Many Federer imitators also point their racquet faces to the ground on the backswing. Another idiosyncrasy I don't understand. Perhaps it gives them more room for acceleration, or more room for wrist roll. But, it also adds a variable to the swing that has to be accounted for. Having said that, would you be kind enough to explain a bit more about what you mean by "delay in the arm and racquet swing." Thanks!