AntiWiggin, i still wouldn't call Deliver Us' vocals 'cleans'. They are more like the raspy-screams/yells found in ASOP, as opposed to the combination of cleanly sung choruses and screamed verses found all over Come Clarity.
But with ASOP, it was just terrible- Anders didn't sound comfortable in that vocal range, his attempts at singing clean parts sounded whiney (as mentioned before) and thus they were kept to a minimum. It didn't seem like he held his notes very well at all.
But i'm sure i heard somewhere Anders has took vocal training, which would make sense as the Studio Diary #2 clearly shows that they are focusing on vocals alot (a mistake made during ASOP, it seems, was the attention to detail with the vocals and lyrics). I feel that Anders holds his notes WAY better on Deliver Us. I don't listen to Korn so i can't compare them at all, but from what i've heard of Korn- it's just a load of snorting out growled vocals here and there, alongside mumbling barely-clean singing.
As Krofius says: there is still screaming in the other songs (how does the screaming sound Krofius? Like ASOP's rare screams? Or CC/STYE?), i just feel that these vocals on Deliver Us are much more unique than anything any band is going for at the moment, instead of cookie-cutter growls and high pitched screams, and are actually performed properly. They are like the 'second-take' of ASOP's vocals! Flyyyyy into the Distaaaaaaaaance!