Im pretty sure the WRC Cars use a sequential transmission which means move the gearshift forward and you up shift, backwards and downshift. There is still a clutch pedal, its just all in the transmission. Then there is flappy paddle transmission. Im a Ferrari tech so Ill offer my input. These transmissions do have clutches like any standard transmission yet they are electronically controlled when you hit the paddle then the information is sent to a TCU (Transmission control unit) then the TCU procedes to disengage the clutch hydraulically, switch gears and re-engage the clutch. Now for you who havent heard about the Ferrari F430 Scuderia, its shift times are almost as fast as a F1 Car. I havent been able to drive one, but have been in the presence of one and heard it drive off when the owner picked it up. First one in Oregon