I'm a firm believer of it! 10 years or so ago there was a group of 6 Iron wood trees in area of the woods I hunt. The 1st year the tree that got hit was 3 inches in diameter or so. The next year he picked a bigger Iron wood tree about 2 feet from the other one. This went on for about 4 years. The last tree he hit was about 10 to 12 inches in diameter. He hit each tree in the same way every year, the only things that were different each year was the height of the rubs, size of the tree's. Each year he would pick on a bigger Ironwood tree. I'm sure this particular buck was a biggin and died of old age. Depending on the area of the woods I'm a firm believer that a buck will rub in the same area year after year.