Thought you guys might like this. Cruised into the office last weekend, 25 mile trip as you can see, this was the mpg when I got there. By far the highest I have managed. Wasn't aware that i was driving any differently to normal, I usually get 70ish. This is UK MPG so according to an online converter, in US MPG it would be 70.6. Car has done just over 2000 miles now and fuel economy is definitely on the rise.
From my very unsceientific monitoring, external temperature has a massive effect. Been cold here since i got the car in January, around 0c mostly, then we had an increase to the 10c you can see in the photo. The temperature has dropped again so fingers crossed when it rises the fuel consumption will again.
The efficeincy shown in the pic is a good 10mpg more than the offical combined figures from VW. Car is a 1.6tdi.