as i said in my edit summaries consistency between articles matters that's how wikipedia works and lists are not an exception to this rule even if several references call system of a down a nu metal band it does not mean it should be included in the list other sources clearly say this band is not a nu metal see here also several sources used in this list are not reliable and i really don't see what makes this first source this second source or this third source a clearly googled search which doesn't even say the band is a nu metal band reliable this list really needs some clean up anyway