I might be mistaken but I was hearing things like 50+ mpg highway and city for the new 2.0 TDI's. This was a while ago so It might be old information. I heard that despite the 40% HP gain and about the same torque gain with the new motor it still gets better MPG then the last generation cars.
Also my VW dealer said they would get their first cars some time in January. I just hope some are still around when I can afford one after I graduate.
.