Yeah, I kinda do take it easy but around town it's more like 40 MPG as I have some fun with it. I think the real key was getting the RPM range nailed down as the power drops off after 3500 RPM so usually I shift at 3000, and the engine is really happy at 2000 RPM for cruise. One thing I've noted in talking with other TDI owners is that there's a fair variance on experienced average mileage, much like here with the VX. I think I'm at the upper end as I haven't heard anyone getting better than 56 MPG out of a Mk5 Jetta.
Just like driving a 3406....Progressive shift, never downshift, roll easy.....10-12 mpg.. Gazz on it...5mpg.