You don't even need to open the scorecard actually. Just click the top left corner to bring up the menu then click off of it to close it and the green speed shows up. Well, as long as the shot in motion will actually land on the green.
It doesn't help you before teeing off on a par 3 if you're the first to tee off but it helps knowing ahead of the next shot what the green speed is.
Hopefully that made sense. lol