Aren't all coins made with longevity in mind? I have some nice CRH find from 1983 and they are zincolns just like the shields and over the 30 year lifespan a coin is said to have when I found them last year. Now the shield I really don't like and would like to see the idea go up in flames because it should be back on the nickel where they stole the idea from to put on the penny. I was jsut thinking that the sheilds are of much lesser quality than the memorials, yet this site shows the content of all zincolns to be the same and in the same way since 1982. So how are the 2009 and shields so much poorer than the 1980s pennies? Maybe this shrinking experiment would shed light on if something has change that nobody was informed of. or maybe, jsut maybe, the quality of some batches are not as up to spec as we would believe for some reason?