As far as im aware the DD rolling road setup makes no attempt to measure your transmission losses, it simply applies a formula to the wheels figure to calculate based on drivetrain type, so the reason that you had the lowest losses was that you had the least power.

Im amazed that the rolling road operator let you leave thinking this was a good thing, surely he should realise that his rollers arent measuring it in the first place?

Agreed that it looks to be running nicely though, good smooth boost line and the AFR's dont wander around too much etc

Still a moderately quick car by most people's standards im sure mate