A recent magazine review implied that the SRAM system has it all over Dura Ace and Campy when it comes to upshifting during a sprint (i.e. you don't lose nearly as many watts during the shifting process for some reason). IF there is any truth to this, watch out. Could be a new ball game - and SRAM will sell a TON of road groups as Shimano and Campy play catch up. That would be pretty key in a race situation.