I only know of two games where hunting was, at some point in the presentations, featured. One was Assassin's Creed 3, where you play as a part Native American during the Revolutionary War, and the other was the new Lara Croft game where she's basically stranded on a not so deserted island. Each hunting scene involves the need to survive. In AC3, your character, Connor, hunts down a deer for meat for some soldiers, then is attacked by a pack of wolves who would take the meat for themselves. In Lara's case, she is the one who needs food, so after aquiring bow and arrows, she hunts down a deer. Depending on your point of view, it does get a little disturbing after that where she goes up to the dying deer and regretfully (she actually says, "I'm sorry") guts the animal.
These are moments not worth complaining about, in my opinion. Granted, both scenes can be considered graphic, but the situation deems them necessary. How many animals did they kill in Red Dead Redemption, one of the best games in recent years? Hunting in Red Dead could be excessive (and, I admit, a little addictive), but it was a western, and McDonald's hadn't expanded that far, yet.
The demonstrations the game developers made for E3 probably could have left out these hunting scenes, and we don't know how promonient hunting will feature in the games, if any more than the two scenes mentioned, but the under the circumstances, these are fact-of-life moments for the era in AC3's case and for the situation in Lara's case. Both Larry and Eric are not vegetarians (listen to the podcast a few times and you'll learn of their love of Texas Bar-B-Cue quickly), so hopefully they'll think twice the next time they look at their plates.
I would also like to point out that I am not a hunter, but I hold nothing against hunters (although do you really need a semi-automatic rifle to kill an animal?). I don't know if I have the stuff to actually kill an animal, but under the circumstances where I needed to survive, I just might.