okey..let me get this straight for you..
in my point of view:
Duras and friends was indoors leveling (instance) they where 6 ppl (first exploit) duras left grp and tagged all mobs without beeing in party and the other 5 ppl dpsed them down so duras got all the xp (second exploit) they uninvited a party member so duras didnt get teleported to his HS location (third exploit) and again they uninvited duras so the other party member they uninvited did not get teleported (same as the third exploit, so basicly, fourth exploit)
and they asked a GM if it was legal or not, and if you ask a GM about that, u know its illegal..yes they got the respond "clever use of game mechanics", but do you all remember swifty? well he also asked a GM about his little trick, and also got: "clever use of game mechanics" but it's still and exploit and blizz changed it as fast they could
(link to swifty for those who don't know http://www.warcraftmovies.com/movieview.php?id=26232)
now, to my point of view of Nyhm
Nyhm lvled outdoors..we was not in a party, but had a healer heal him when he was low on HP (no exploit, it's called friendship) Nyhm got all the XP for the kills since he tagged them and killed them on his own (can't see any exploit here) The healer got no XP for helping him (it's unfair but he did it on own free will)
so basicly, no exploits for Nyhm..yes, same thing, but without exploits..
so in my opinion, Nyhm is the real "first to lvl 80" for me..
so QQ all u want Duras and friends fans, but your cheering on a cheater...