Each to their own I suppose! Personally, I fully intend to use the car as it was intended - and not give a toss about consumption. Gotta fill up at some point, I'd rather fill up one extra time per month and have had enjoyed my driving!
Also, you have to remember that the mpg you'll get is highly dependent on how you drive anyway - so it doesn't really matter what VW say you will get as those figures are not how you'll be driving in the real world!