It seems Digital Foundry more and more starts to understand the PS3 architecture:
Regarding Killzone 3, some of their more insightful/interesting remarks:
"Cell-powered pre-processing optimised the amount of geometry RSX actually had to process, allowing for richer, more detail-heavy environments, objects and characters. Post-processing effects work such as the camera and object-based motion blur was hived out to the SPU satellite processors - another example of how the CPU was utilised as a graphics co-processor, with the visual effects work distributed between the main processor and the GPU."
"PlayStation Move represents the most accurate, flexible controller in the video games market and had yet to be fully utilised in a first-person shooter - a challenge Guerrilla Games took very seriously. Sony's strong advocacy of 3DTV technology also needed to be backed up with as much high-level gaming support as possible, and despite the apparent impossibility of the task, the studio came up with an ingenious solution in implementing stereoscopic support into its existing engine. "
"Sony's morphological anti-aliasing (MLAA) that worked so beautifully in God of War III and LittleBigPlanet 2 has also been deployed within Killzone 3 and its effect on the overall appearance of the game cannot be under-estimated. At its best, MLAA can produce results beyond the quality achieved by 8x multi-sampling anti-aliasing"
"Sony's implementation is one of the best available (if not the best)"
"Guerrilla's own presentations suggest that the powerful satellite processors had around 40 per cent leftover processing time, so the process of moving anti-aliasing across from GPU to CPU is a good way to free up precious RSX resources, not to mention saving around 18MB of precious graphics RAM. "
"Just like its predecessor, as a technological demonstration of the power of Sony hardware, Killzone 3 is a hugely impressive piece of work. But what makes this game so special is that the core gameplay experience is just so strong: in the midst of battle, nothing looks like it, nothing plays quite like it. For PlayStation 3 owners it really is a must-buy."
http://www.eurogamer.net/articles/digitalfoundry-vs-killzone-3