The dpreview.com review says it overexposes:
review.
I think a gray card test wouldn't tell you much, unless you have a camera whose meter you are used to and comfortable with. Otherwise it's just a number in the middle. I actually think my camera will expose a gray card dead in the center of the histogram, though it underexposes a lot in the real world.
A more useful test is to use the camera and see what it does in different situations. In deference to dpreview.com, turn on the blinking highlights so you know when your highlights are overexposed. That's important because the blinking parts will have little or no detail. If they are important parts of the image, make adjustments to keep them from overexposure.
I suggest taking some photos with the sky in them. My camera loves the sky and hates to overexpose it. I have learned to compensate for that if my subject is not the sky. Other situations work the same way - pay attention to scenes where your camera might get it wrong, and what fixes it.