i agree with everyone who says that Naruto is an idiot and, in reality, would probably be killed by Itachi or even maybe Kakashi if it was one on one. But you're forgetting something: the show's got his name on it, he's the main character. That means he won't ever lose in a life or death match, ever.

and, yeah, with all those clones that went out there, it's unlikely that the one Itachi found is the genuine article.