I haven't experienced any noticeable difference, particularly when the monitor is facing upward (as it typically is for me, for easiest viewing). In this case it is the width x depth of the monitor that is contributing to your drag, and the actual difference in width between a 5" and 7" monitor is less than 2", so minor in comparison to the entire cross sectional area of your setup. I do need to hold the housing and monitor a bit farther away from me when shooting wide angle and finning, but again that is no large difference.