At 1400 km, my gas mileage reads 10.2 L/100km. Avg. speed is 68km/hr. I know it'll improve as time goes on and excited to see what it will really be.
I run mainly highway with only 2 stoplights on the route.
My '08 Impala SS was an avg. of 8.8L/100km and my '99 Grand Prix GTP was 8.7L/100km with Premium fuel. Both were relatively close to the advertised gas mileage and really not too bad considering the size of the car.
Everyone comments on me being impulsive on buying another new car and I justify it to say I bought the Camaro to save on fuel.