Ryan- I disagree with you 100%
Most of my rock is 6 years old, and I can still tell which pieces of rock came from the different locations around the globe!
For example:
My Fiji rock is more abundant with feather dusters and worms, and the coraline growth is also a deeper shade of purple.
My Tonga branch has little to none of the same type of feather dusters, yet has a blotchy red shade of coraline growth, and also a greener crust.
The Vanuatu rock has a wide aray of colorful red and pink crust coraline branches, as well as being the second lightest shade of green crust, with only brown feather dusters.
The Jarkarta rock is a very faint shade of green, which has the lightest coloration of all my rock, with little coraline growth and no visable feather dusters.
The Marshal Ils. rock is almost completly covered in coraline with little green appearance left, it also has more feather dusters than any other piece in the tank.
Sure if you looked into my tank and didn't know a thing about reefing, then you would say it's full of a bunch of rock and corals. However any experienced reefer would be able to tell right away that my rock not only differs in size and shape, but also in colors and life forms.
Rich