And here are two interviews, one with Robert Kirkman and one with Andrew Lincoln.
And here are an interview with Robert Kirkman where he says:
There are some things coming up in the 3rd season that I can happily and proudly say exceed some of the darkest things that we’ve done in the comic. I think people are really going to be pretty shocked with a lot of stuff that’s coming. The show is gonna have teeth, the show is not going to be a watered down version of the Walking Dead [comic]. Seeing it thus far, you’ve got zombie autopsies, Sophia, and there is definitely a lot of dark stuff going on in the show, and it’ll continue.
How about that...