I guess it depends on what you prefer the feel of. If the pro's all run different settings then that alone tells you its more a preference than outright pace. I have tried forward and backward and much prefer the feel of the car with it forward. I found no real difference in lap times (possibly a tenth) but the car is much better over a run with it forward. In fact I have found concentracting all the weight towards the center of the car means where ever I go I drop the car on the track and turn good times from the get go before I bother doing any tuning. I can only see this as a good thing.