Procrastinato on 01 August 2009
X360->PS3 ports start out life having to run on one PowerPC core (rather than 3), and with only 32x550MHz vertex+pixel pipes, rather than 48x500MHz.
Its takes some time to farm off tasks to the SPEs, and rework your rendering engine to take advantage of the SPEs, to augment the GPU, as well.
Give Carmack some time. He's awesome. Rage is supposed to work wonders, with regards to streaming textures and environments -- the PS3's HDD is definately the best device for such work between the HD consoles. I imagine they are working hard to bring the PS3 version up to speed -- they just need time.
