Originally Posted by Emissary of Justice
Not really. The different graduation/promotion ages were the fuck up. Kakashi would've been placed on a completely team coming out of the academy and would've been promoted to Chunin alongside them as the exams have to be done as a team.
I agree that the different graduation/promotion ages were a fuck up. However, they don't have to participate as teams in the Chuunin exams in its entirety. Only the initial exam (if the teacher is sadistic and makes the exam team only), and the Forest of Death are team based. The final tournament can have any number, including 0, get promoted. We've seen Shikamaru as the sole promotion of the only exam we've witnessed, and Sakura was promoted during the time-skip without the rest of team 7.