i don´t see how it is favoured vs properly piloted Rush Warri (and yea i saw the spread, but that is the start of the meta when neither decks nor playstyles have adapted much) - you know the lethal range, you know there´s at most 9dmg headed to your face turn 8-9, so you can easily trade some early health to buff up your board, then take control midgame and if the DH is behind on turn 8 the 8/8 looks far from op. Pretty much the same gameplan priest has right now and is winning 70+% in high diamond (also a match that VS list´s as unfavoured because apparently many priest still play too greedy lists in an aggro meta or are just not great).
Gnomes was friendly enough to include some examples of Priest vs DH matches in the Priest to Legend discussion: Got to legend and some D5 to Legend stats - #39 by Eulrich-2784 you can see very clearly that DH has quite some weakness that can be abused, even with a greedier Priest list.