I used to receive a free subscription to Gun Test. I quit reading them after about 6 issues, and ignored their mailings asking me to purchase a subscription.
As has been noted, their writers were (haven't read an issue in a couple of years) notably inexperienced. They often wrote about the "feel" of a gun, based on having allowed "people at the range" to hold and/or shoot the gun.
My biggest criticism deals with their inappropriate test criteria. They would test several "self defense" handguns, and invariably proceed to pontificate about the results of accuracy tests. (I'm of the opinion that virtually every pistol selling for $500 or more will deliver accuracy that is more than adequate for self defense use).
But they never attempted to test reliability. Worse than that, they would gloss over any jams, FTF's, FTE's etc that occurred during their "tests." They would report that "Except for a few instances where the gun failed eject the empty cases, the gun was virtually flawless."
Tests of sporting shotguns seemed to hinge on whether or not the author thought the gun was "properly balanced" -- along with comparisons of the lines per inch checkering on various makes and models.
I think the content was 60% garbage, and about 20% personal preference.