I don't drive like a maniac, but then I'm not slow either. "progressive" with the throttle would be a good word, as my boost can be a bit erratic so I often feed in power. But when in traffic, there's nowt you can do but just pottle along at sub 1500rpm, and my car seems ultra economical - guess it's not using the turbo and not needing much diesel. Don't forget the LPG helps.
Car is on about 95,000 now - engine has just gone past 43,000
Dont know how you are getting such good economy with the VT5 Jason, as my commuting average has dropped about 5mpg since fitting and now hovering at around 43mpg!
48mpg on long journeys.