True fuel figures cannot be mentioned currently. As the engines take 5-7 thousand kilometres to go to optimum which people here might not have achieved yet. I myself have clocked 1300, however the current figures are around 10-11 and my drive includes occasional full throttles, school duty and AC idling.
About the VSA system, here is a text defining it briefly: The Vehicle Stability Assist system helps to stabilize the vehicle during cornering if the car turns more or less than desired. It also assists you in maintaining traction while accelerating on loose or slippery road surfaces. It does this by regulating the engine's output, and by selectively applying braking.