See that kind of highlights what I was saying that on the forums defiants on all servers say defiants are useless and guardians say the same about guardians. Even just here in the last 4 posts, we have one person saying that when they do warfronts as defiants on Shivermere they win and another saying when they do warfronts on shivermere the defiants lose.
I think its just one of those things where it comes in streaks and perhaps the losses are more noticeable than the wins. It would I suppose be an amazing coincedence if all the rubbish pvpers all went defiant on all 3 servers of Argent, Icewatch and Shivermere.
I'm with the ocuk guild on Shivermere and I'd have to say that if I looked back over the warfronts I've done, its probably 50/50 or thereabouts. I do tend to mentally take more notice of a run of losses than a run of wins, but I reckon overall if I tallied it up it would come out somewhere between 40/60 and 60/40