I started on day 4, and I can tell you with 100% certainty, NO BIAS whatsoever, as alliance as soon as I entered Blasted Lands it was completely broken. Ask any ally who started a few days after, it was packed as **** with Horde, we could barely leave Honor Hold, all the quests were full of Horde.
It's not an opinion, it took me 3 days PLAYED to hit 70 on my Warlock and I knew exactly where to go and what to do, I just spent so much time DEAD I couldn't do anything. It's gotten MUCH better, my Hunter is almost 70 and I've barely got 1 day played. It was a massacre..Please don't even begin to try and tell me it wasn't that bad...To do Ring of Blood we had to make a 30 man Raid Group, and even then it was a fair fight...We just go the jump on them, and had to fight them off continuously til we completed it...