I have no doubt that there are some folks who can put together some ridiculous groups at 40-50 yards. I occasionally shoot with semi-pro 3D shooters as well and they simply amaze me at what they are capable of achieving.
Myself? I am not the shooter that most folks are. If I can get 7 or 8 inch groups at 50 yards then I am happy. JeffB tells me it is because I shoot too short of a bow.....