I just finished 1,000 km on my '09 X Ltd. and did the math. It came out to 9.4 L/100 km (even though the dash readout had it at 9.2 nearly the whole time). That works out to 25 mpg according to the online calculator.
Not too bad, especially since the engine is probably still a bit tight. I am going to try to set an all-time record on my next fill.
Griff