interesting topic.
ive found after getting my new car, that mitsubishi maf sensors (afm) as much more temperamental with smooth air flow and turbulence. generic pod filters make the mitsu afm read rich and often the car will stall. to overcome this the mitsu guys run a long intake pipe, where in theory, by the time the air is at the sensor, it will have aligned. or (which are now available) u can get specific pod filters with work with the mitsu maf sensor and keeps the air aligned, to prevent the circular motion of air generic pods create.
so whats this got to do with skylines? well i guess all cars are prone to this, just nissans are a lot more robust and the effects are minimal.