Also went for my first longish run the other day, about 80 miles each way on the M62. 70-80mph all the way, average of 51mpg, which I was very happy with.
For our normal driving - which is mainly slow town driving, usually stuck in traffic, and only shortish journeys, we're getting 34mpg, which again I'm happy with (particularly considering it's winter, and the car has only done just over 500 miles, so will hopefully improve a bit). For comparison, my 135i got 22mpg in the exact same driving, so I'm thankful for the improvement