Something that would have to be a significant factor in someone's potential for seeing a substantial impact would be the degree to which inadequate nutrition is a limiting factor for them when they start something like this. Take Stickers for example.....he's in an area with good soil and plenty of quality native understory vegetation. The deer on his club don't have a massive nutritional void to fill. I would think that his potential for seeing a substantial impact is pretty low even if he does feed for years. Compare that to someone else who may be in some really poor habitat without much quality vegetation....I would think they would have a lot better chance of seeing tangible results from years of feeding. From what I've seen....unless you've got some really deep pockets and are willing to commit to shelling out a lot of money to feed deer across a pretty good swath of land....then just forget about growing big bucks with feeders and pellets. Its only realistic in certain situations.