The problem with PVE guilds is that most of them are just remnants of the raiding ability they had in the past so the only reason they get attention and still somehow drag them selves on is simply because they used to matter,others that are fresh out of the pot,whether by merging,or just reforming are unknowns but still cocky as hell,which doesn't help either.
All in all atm there is no competition,racing for warmane first kills is usually quite one-sided,and even then when it's done,everyone will start pointing the fingers that it doesn't matter or was not legit or that X guild got advantage over Y guild.
Atm there is only one truly hardcore raiding guild,and it's on horde side,sadly applications are closed unless you're a true wizard,hopefully that will change in future.
/Imperial