Board Thread:Theories and Speculation/@comment-25283946-20150827094813/@comment-734582-20150830133311

Sharingan91 wrote: But from the spoiler of the movie, Konohamaru doesn't seem very mature XD. Neither Minato nor Jiraia seemed mature, and that's the Fourth Hokage and a legendary Sanin for you. Hell, the most powerful Kage, Hashirama, was like a kid sometimes.

But when it came to important stuff -protecting the village etc- these people were mature, and capable. Being a Jonin is about getting your team into a fight, and safely out. Same for a Chunin. That's why Shikamaru was the only one to promote to Chunin in the first (known) exams, despite losing his battle.

Being Jonin/Chunin is about battle-smarts, and whether you're a perv or a weirdo or childish in other ways doesn't matter.