regardless if they are punk or metal, they still fall under the "sucks" catagory. if you go to the "sucks" bin at your local record store you will see their albums.
Well, if you goto any of thier concerts, you'll probably see hardcore dancing, so I'd classify them all as hardcore, just because it's easier than like finding a subgenre of hardcore for each. Labels rarely matter however...
as i am now aching all over from the pit at last nights From Autumn to Ashes gig, i can say they are probably hardcore wasn't too impressed with the other bands, they were just screamo-emo... FATA were great though.
don't know much bout the other'sbut I'd say atreyu is metal.their guitar work is way too intricate to cll em punk I've heard little from autumn to ashes..I wouldnt say they suck..its just nu-metal.not my thing,but they seem pretty popular