In my opinion, MemnochTheCaT's assessment of Naruto says it all. He is pretty unbalanced. There are some skills that are possibly Jounin-level, and some skills that are still on the lower end of Genin-level. As far as Naruto being ready to become a Chuunin, I think not: he has never demonstrated the ability to lead a group of ninja in a tactical situation, and this is pretty much exactly what a Chuunin is supposed to do.

While beating the crap out of everything that stands in your path in the most obvious manner is impressive, and, in the series, imperative for Konoha's safety, it is not the way of the ninja. The series has been focusing on Naruto's grand-royale-style battles a lot, and perhaps this is why people are so impressed with him. However, we've seen enough of various missions to know that this is not the way of the ninja, and it is not an acceptable mentality for an upper-ranked ninja to have.