I have noticed that on my latest capture I few at 90' (I don't remember exactly) but I know I was getting an average GSD of 0.3" which was okay for the height and my camera (DJI inspire 1).
However, I noticed that this data set had more noise on the roads and flat surfaces that previous captures done much closer. Also this latest data set was done in Nadir and not oblique.
The reason I ask this questions - If there is a relationship between sensor and height / distance) is because back in January I acquired data with a Parrot Bebop which has a "lesser" sensor and I was getting a lot of noise throughout the project.
In all instances, calibration is good / acceptable.