Last time you called bullshit on something I said I had to post my P60, I have no way of proving you wrong this time as I no longer have a relevant car. So take it or leave it, but you can achieve 55mpg out of a 1.8t if you don't drive like a spastic.
If you're such a hero at knowing everything about 1.8t's, how come you can't seem to keep one running for more than a month? Maybe that's why you can't get decent MPG out of one?