As far as motorcycle magazine testing goes, Roadracing World seems to be about as honest as they come, but I'm always suspect of stuff that the mainstream motorcycle magazines print, especially Motorcyclist and Cycle World. Too many times I've seen them print stuff that I have experience with, and it's like we're talking about two different things. I don't know if it has to do with pressure from major advertisers or what.
That said, a few years ago, I was at a track day where Motorcycle USA was testing open-class bikes for a magazine article, and I was impressed with these guys. This particular track day organization had an "A+" group exclusively for expert-licensed road racers, which was really nice. There are a number of non-racers who have done enough track days to be able to get into the "A" group, but if you're a racer, it's just unneccessary traffic, and a polite pass for a racer might not be percieved as such by a non-racing "A" group track day enthusiast. Anyway, all the magazine guys were expert-licensed road racers, so they took their stock open-class bikes out in the "A+" group. The more pedestrian motorcycle magazines might be a little bashful about pushing it, for fear of turning a loaner bike into a rectangle and damaging the relationship with the manufacturer- these guys were not. Somebody got their feathers ruffled, and before long, it was starting to get physical out there. The Ducati 999R, by far the most expensive bike there, had almost been looped earlier during acceleration testing on the drag strip when it's finicky dry clutch got a little grabby. And now I was watching the same bike coming around with it's turn signals broken off and dangling by their wires, as these guys were stuffing each other on the brakes, backing them into corners, and torching the tires doing sideways corner exits. It was pretty freekin' funny. They were not disturbing anyone else in the session, or I think we would have had to pull them in and have a talk with them. Anyways, as far as magazine tests go, Motorcycle USA rode the wheels off of the bikes they were testing that day.