Gyrene, I could tell the same thing as was already posted. He just beat me to it. I know we don't all have high end systems. I rarely ever did myself.
I wonder if you might benefit from sliding the object detail slider more towards the "4 miles" side of the spectrum?
I guess I can see how some might benefit if HT tweaked the LOD ranges on the runway display itself, but for the most part I know the runway is surrounded by the grey at those angles. If I can tell "the grey goes this angle" I know instantly the runway does as well.
I wonder if I have a screenshot of my own just to compare if the graphics... (I'll go snag one)