From IGN's review:
That being said, you are going to have to put up with some extremely weak visuals within Haze. There is a litany of problems with the game, from the odd warping of allied soldiers that blink into view suddenly at arbitrary checkpoints to poor texture work. Many of the environmental textures are generic and weak, and you'll frequently see seams or tearing constantly pop up within the game, which distracts from the action onscreen. The worse example of this has to be the visuals for the flamethrower, the Dragon de la Gente, which vomits a horrid cone of supposed flame that looks visually on par with what you'd find from the 386 PC days 15 years ago. The same could be said of the reboot text for Mantel troops, which looks blocky, heavily aliased and nondescript. Not only will you constantly see render passes over levels or character models, you'll find extremely generic faces on some soldiers and odd detail work on others. Duvall, in particular, frequently looks as though his eyes are going to pop out of his skull (Then again, that's when his hands aren't found with objects blatantly running through them, such as a bar in the helicopter during a cutscene.).
Is this what they mean by performance?
My Mario Kart Wii friend code: 2707-1866-0957
