I think people may be confusing legacy accounts with standard 1.0 accounts again. As a non-legacy 1.0 player, I was not able to ride my goobue until (assumedly) I joined a grand company and got my chocobo licence (3102, and then 90000 error prevented me getting that far lol). In the mean time, my legacy friends were able to use their chocobos and goobues straight away.