Given from what I read in the wiki, the manga isn't 'extremely' far ahead. From it's latest episode, I'd say it's roughly 30 chapters back from the latest manga update, this is out of 215 chapters.
I've only watched the first 5 episodes of the anime. It's frustrating, I was told that it followed the manga to the letter, but it doesn't.
I'd give it a 20% accuracy that slowly climbed to 80%, I assume it eventually becomes completely accurate. I suggest reading the first few chapters though, I personally prefer the manga's start, though I understand why the anime went the direction it did in the beginning.
EDIT: Thinking it over though, I'm honestly surprised they were able to fit nearly 200 chapters into 40-50 episodes.
Last edited by Tenshi Nova
on Thu Feb 27, 2014 6:06 am, edited 1 time in total.