You get 15% a week, meaning you have to do far less work than people used to have, it's a very quick (15 min?) ish to get very high amounts of XP.
People did get rank 10 chocobos at 2.0.
I don't have mine yet, and I still think that it's a very massive upgrade. Unless you think it should be easily finished within a few days, then I dunno man.