Is it that these properties produce land in which is harder to hunt and the deer live longer? If this is true, it begs the main question...is the age of the deer more important than nutrition?
IMO, age is by far the most important factor in allowing deer to reach thier antler potential. Heavy timber with lots of ravines often allow a deer to live another day.
This is one of those dirty little secrets that the "industry" does not want to get out. They cannot put time and a bag, stamp a big buck on it and sell it. [;)]