I can say that I have a 2009 PE Line Desert male. He is probably the oldest ball python out of the 39 that I have.
He weighs in at a whopping 450g. Up until recently he would only eat rats just a bit bigger than crawler. It also does not seem to matter how much he eats, he just does not grow. I have just recently got him up to eating weaned rats, so we will see if he grows more or not. From what I see in my own, growth stunts maybe a thing with them, and perhaps some display these growth issues external, some like most of the females maybe internal.