I am in no way shape or form attempting to be a smart ass or start trouble, but you ask every member that posts on this thread to get pictures of other peoples old Aro's. When they post them you immediatly disregard they're post's by stating " Very nice aro , but it does not count because we are unsure of how old it is."
I think the size of the aro is more important, obviously a 2 foot aro is very common, but the difference between a 30" and 34" aro is huge. perhaps 3-4 years of growth. I just think age is impossible to fully represent when 9/10 people with aro's do not document their growth because they are MONSTER growth fish. like RTC and Pima...
Long story short, the bigger the ArO, the older obviously