Mine is also in the 11l/100km region. The turbocharged mini's seems to be more economical than the supercharged. Probably why they ditched the supercharger! Always on, power always there.
Guys dont forget everytime you fillup, go to the fuel consumption on the tacho and hold the button down to reset the l/100km reading. This way you'd be able to determine your readings on that specified fillup.