I believe arm strength is over rated. For every strong armed loser; Leaf, George, Russell, Smith, etc. there's an under powered winner; Starr, Montana, Staub, Brady, etc. Some even questioned Rodgers arm strength when he came out. There are other things that are as or more important, like poise, decision making, leadership, fortitude, etc. Also, these are young men and they will get stronger the next few years, some more than others, especially with professional strength and conditiong training.
Why is Jerry Kramer not in the Hall of Fame?