Reasonable on 30 September 2010
If you mean code efficiency, use of controls, use of system resources (which will normally surface through game performance, fps, resolution, etc) then yes, of course, no question about it.
Given most consoles have different specifications supporting them all forces a balancing act with regards to optimization of the engine/interface while supporting only one allows a greater degree of optimization for all aspects of the game.
Try to be reasonable... its easier than you think...
