[Most] hybridizers will wait and see how a seedling takes a move before offering it for sale, so there is significance to it.
In my own experience, I've had seedlings take off and amaze me with their rate of increase after moving. On the other hand, I've had them sit and sulk and/or refuse to bloom for a year or two after a move. I've also had them die after moving them. How a seedling performs after a move is very important.
It's one thing to gather stats while it sits undisturbed for a few years...but how it rebounds after being stressed by digging, dividing and replanting will show you just how much merit a seedling has.
