I’ve wondered the same… the PC Mag review baffled me at first, as it’s very much at odds with every other review I’ve read about the camera.
I think I finally understood what was going on when I re-read this segment:
In our view, low-light conditions make image stabilization essential in auto mode, because the camera’s shutter speed will usually be set very slow to compensate for the low light.
It seems to me that the PC Mag review is done by someone who understands computers, but not neccessarily someone who has a good grasp of photography.
For someone who does (say, the dpreview reviewers), the OIS offered by the FZ5 seems quite good – they know what the limitations of ultrazoom are without OIS, and they can see how far the OIS pushes the envelope of what they can do.
It seems that the PC Mag reviewers aren’t as familiar with photography and have some unreasonably high expectations – thus, instead of being impressed with how much more performance they can get, they’re unimpressed because there’s still a limit to what the OIS can achieve..