well, the comment should be seen in its context. I think orbital 's comment was referring to Amarillo's driving habits on the motorway. Outside the motorway, I fully agree with you.
For reference, yesterday I drove 300mi straight, was trying to keep it at 140km/h or 88mph, on long downhills easily 150/160 km/h or 100mph.
This is german Autobahn, I usually commute this stretch with my Q7 at 200-240kph, traffic permitting and yesterday felt very boring at 140km/h.
But this was commuting from work to home, so the time "pressure" is different than when travelling leisurely.
Btw yesterday' consumption was about 30mpg, empty Ocean 150 DSG 4Motion with 235/55 17" Winter tyres, windout awning and bike rack (folded), just the driver.