Seriously, his (valid, IMHO) point was that driving eco-friendly was all well and good when conditions allowed (A distinction not being made by the training manual) - but when interacting with other drivers, accelerating slowly, for instance, would often mean you could never (legally) enter a road where you're required to yield.
The Norwegian definition of yield being that you should in no way impede on the operation of the car with right of way - in theory, if you're entering a road with right-of-way and a driver already on it has to ease up on the throttle pedal even for an instance to maintain safe distance, you're breaking the law.)
https://www.admin.ch/opc/de/classified-compilation/19580266/... (German)
He told me I was a bit slow changing gears, but fine at anticipating when I'd need to stop.
As for eco-driving, I was told in no uncertain terms by the guy who examined me that if I tried to drive as eco-friendly as the official course material suggested, he'd fail me for being a hazard to other traffic.