Yes and that is why Avenged Sevenfold no longer screams as much.They said that they do not want to be the same band forever,they wanted to change,they wanted to try new stuff.When they were recording Waking The Fallen,they already decided the album would be half-sing-half-scream and the next album,which is City Of Evil,would be all singing.
I think that it's good that they did the albums how they did it.True,i may prefer Second Heartbeat to Unbound,but that doesn't mean that i will always prefer the screamo stuff to their more recent albums.You've got Beast And The Harlot,Bat Country,Afterlife,Seize The Day and many more.So i think their change is a good one,though it alienated some fans.