Remember...You are reading their ads (marketing) info...Most companies tend to either exagerate the situation to their advantage...I have checked ranges with my 660 Nikon while bowhunting and do see a difference when ranging trees at the same height that I'm setup as well as 3 feet off the ground and at the base of the tree...It is not as extreme as their example....With a high powered rifle its not enough to worry about (when in a tree)...
If we bought in to all the bs thats handed to us on deer hunting we would need a wheel barrow to carry everything thats needed!!!