I am cynical about it, and this is the reason why. My friend once worked as a computer programmer for an company IT company. One of their clients was a chicken processing plant, i.e. live chickens in one end, chicken breasts in polystyrene/celophane/label etc. the other.
The "halal" chicken was exactly the same process as non-halal, the only difference being that the Imam for the local Mosque recited a prayer as the chickens were being killed.
I'm not saying that all halal poultry or meat is like this but just giving this example which shows that halal doesn't always mean different just as products labelled low fat might be full of calories from sugars.