Yeah, I watched the ANBU version, and they never mentioned anything about Sakura being trained by Tsunade or any of the Genins becoming Chuunins.

Anyways, to post my opinions on the episode, I thought it was pretty good (but then again, that's what I say about most episodes). Adding those Hidden Mist ninjas was unexpected. Hehe, once that guy said lucky, I was thinking, "Is he actually who I think he is," haha. It'll be quite interesting what new moves they have, considering how they really pissed off Naruto's team in the Chuunin exam.
I do have to agree that Sakura lifting up that piece of log was messed up. I would understand about the Inner Sakura thing, but that was the thing, why didn't they just show that to avoid confusion? Oh well, I guess we'll have to see later on.
Overall, a pretty decent episode.