When the attack started the examiner told Sasuke that the exam was over so I'm guessing that mean's that none of them will become Chuunin's. Out of the three match's that were showed the only person that the Chuunin selectors seemed to be impressed by was Shikamaru.
What kind of gennin can use Legendary Ninja level summoning, and Jounin level shadows clones?
I think Neji could, I think Neji is the best at using his chakra and I think the only reason Naruto beat him was due to Neji's lack of training that month.