Agree, On my longer trips, i usually set off early in morning, and stick to around 56mph, on the way back - its a different story haha !
So outward journey 80 plus...return journey average 66mpg.....still an incredible daily mpg, esp for such a comfortable car, with most of the 'extras' you need in a business class vehicle.
Off topic, not long after i aquired it, i saw an identical spec, but with red leather seat option, and panoramic glass roof - not many like that out there !!