my understanding is the same is true for BB. skills are widely thought to begin declining somewhere in the early 30s.
the career arc, as i understand it, is something like this:
18 - 22 most fruitful years for training
26 - 30 skills maxed out (although experience should be rising -- i think as BB matures, this will become a more critical and valued feature for players)
32 - xx players' skill begin to decline (but they can be modified by a trainer; don't know to what extent)