*kicks Naruto doubters*
I think most of us are disgruntled in the manner in which Naruto got powerful. The Senjutsu training/kage bunshin training reeks of Dragonball Z so much that some of us just roll our eyes.
The
smart thing for Kishimoto to have done would have been to have Naruto learn Senjutsu over the time skip. When he got back he would learn things like Rasenshuriken with Kakashi, and delve into the Kyuubi topic with Tenzo. At least this way, his power would have a sense of believability.
However, I am starting to think that Jiraiya focused on Kyuubi for a reason. He may have been gearing Naruto toward something that will require having knowledge of how to use Kyuubi and the key. Probably revolving around what ever "that jutsu" that Jiraiya mentioned to the frog key.