Yes unfortunately we never could get that subforum. I would say serve is more vitally important to a top tennis player in general. You have a head start in point construction that you won't have in a return game. No player can afford to simply play loosely on their own service games because they're not in control of what the opponent bangs down and will inherently be at a disadvantage most of the time on return. Also because you can get free points on serve but can't on return - except DF's.