Personally i dont think texture quality matters as much in FPS. You're pretty much always in constant motion for the most part and the action is more often then not fast paced so you dont really have time to stop and stare at the ground or wall like you would in Oblivion which also had low res textures in many places. Half Life 2 didnt exactly have superb textures either but the art and game play carried that fine. Granted its a few years old now but my point is you didnt notice it and i'd bet most wouldnt if they played it today either.
Also keep in mind the memory limitations on all consoles. You allocate your resources as best you can.
Also keep in mind the memory limitations on all consoles. You allocate your resources as best you can.