GUN TEST Mag seems to run into a few guns (FAR less than I see, however) that don't work and have to be returned to the factory, and usually seem to get them repaired/replace FAR more often than I do, but maybe they are just lucky too.
I'm a little leery of taking gun magazine reviews at full face value. Manufacturers send out guns to be tried out by magazines and bloggers who will review them... do you think they don't cherry pick the nicest example of their product they can? If there's an issue noted by the reviewer, of COURSE the company will take care of it, that reviewer has a voice that is being heard by a lot more people than the usual joes like you or me. There's also the issue of the gun reviewer not wanting to sour a relationship with a manufacturer, who might stop sending them guns to review. Ever notice how certain gun magazines never seem to have a bad review on anything? I think the individual reviews you find on websites, and in forums like this one, are a lot more likely to reflect truth.