I agree completely with Barcam. Another issue with car reviews in the press, even the left leaning Guardian, is that the staple diet is performance cars from prestige manufacturers. Not only that, they are usually the most highly specced models.
So, one week the reviewer is testing something like a Porsche then they might have to test a token ordinary car like the Jazz. They'll be a bit peeved to go back into the real world like the rest of us and it shows in the critical reviews they write.
I was interested in Barcam's review of the Fiesta Ecoboost . Last week I had a lift in one and, I have to say, I was quite impressed. Obviously the acid test would have to be a test drive.