Is the GTD longer geared?
The gear change prompts when driving economically seem to occur around the same point as on my Scirocco e.g 3rd from 20-25mph, 4th from 25-30mph, 5th from 30-40mph and 40+ for 6th. 80mph is 2200rpm, same as on the Scirocco. If there are any gearing differences, they are tiny.
I actually had my best run ever today - 49.7mpg on a 37 mile run on moderately busy roads with ave speed of 27mph. It just refused to crack 50mpg. The last few days have been good on the juice (apart from the 8 miles Benfield ran with the car).
My dad is up for a visit next weekend - i'll have a go in his car and see if his is quicker than mine. With the GTD it seems far more important to be hitting the torque band just right to get anything out of 5th and 6th.
Hoping the VW tech will have uncovered something to try tomorrow when I get my suspension mount bearing sorted out.