Perhaps the reviewer didn't discover that the Jazz has both a height adjustable driver's seat and an adjustable steering wheel.
I'm surprised by the reported 3,100 prm at 70 mph. My CVT Jazz cruises at no more than 2,200 rpm at that speed and I would have expected that one of the benefits of the 6th speed on the manual gearbox was to drop the cruising rpm. Perhaps the reviewer was in 4th gear while thinking it was 6th gear?
And, like most of the press reviewers, the driver has a heavy right foot which keeps the engine revs in the noisy range. Move to a higher gear, get the revs below 3,000 rpm and the engine noise isn't noticeable.