[quote=Sathanas Rex]
I'm not the gm or anything so I'll probably get the hammer of doom, but I think as chunin that are starting out the characters shouldn't have mastered anything D:
[/quote]

I would agree in the case of newly minted Chuunin. However if someone has been a Chuunin for awhile I can see them having mastered some skills. The problem with a lot of it is that Kishimoto kinda screwed with the power scale to make a more interesting story. Technically nearly every genin we see in the Rookie 9 at the beginning is almost or already Chuunin level compared to what was originally described.