DWB is certainly a more relaxing way to drive!
'Ecodriving' with the emphasis on producing less CO2, is a small part of the syllabus here in the UK. But only a very small part.
I'm considering the idea of trying to offer some coaching sessions on how to be more fuel-efficient. Having immediate feedback on the dashboard is the key... Driving to a vacuum-gauge is much more boring, and you start to wonder if it's worth the trouble!
This would only be viable with my bigger car. With the little automatic, if I hypermile my brains out I can get a maximum of around 39mpg (imp) as against 36mpg (imp) normal driving...
However I did another coast down test from 50-40 today in the little car.
When the engine has just reached running temp, it takes 9 seconds to slow to the lower speed. When the car is thoroughly warmed-up, the time goes up to 15 seconds (today there was a headwind on both tests)
So the temperature of the transmission appears to make more difference than anything else! I looked for some fully synthetic ATF today. but could see only semi-synthetic... Might help a little?