The point on the gearing is exactly what Henry said. In 6th at 70 if you want to accelerate quickly you need to drop a gear so the turbo kicks in.
In reality you could drive round all day in second as that gear takes you easily up to 60 mph.
Ah. I'm so used to the idea of dropping a cog or two to get quick acceleration that I have never seen this as a problem - it's as easy to be in too high a gear as it is to be in too low a gear. To me, Henry Catchpole's point reads like "If you're driving along in the wrong gear, you need to put it into the right gear to get it to do what you want".
I think if I was on a motorway in a situation where I might need a sudden burst of acceleration, to take advantage of gaps or get out of the way of something, I'd probably be in 4th or 5th anyway.
