That's funny though and shows the difference between live and simmed. Arcane is supposedly the best spec. Yet State of DPS and RaidBots that collect the actual top data from WoL show that Fire is THE top overall dps spec in all categories (10N/10H/25N/25H) and arcane is somewhere far behind. (Well, adjusted totals make shadow priests the current top dps spec, but anyways). One thing is sure though - MM hunters are annoyingly good :P
I can analyze all the reasons for the differences, but we all know that simcraft is only simulating a Patchwerk fight with certain ("optimal" and BiS) conditions. That's not a problem really. It might become a problem when people take SimCraft chart and point out how each spec will do in the next patch, or slightly worse, how it "is" doing at the moment, rather than checking the real data. I also think that it's a problem if you choose your spec only because it's the top simulated dps spec. It's probably just an unfortunate choice of words, but you stated that "warriors movED ahead of us", like it already happened. For me that's taking simcraft charts too seriously.
It's a nice tool (especially for getting your personal stat weights) and sort of a guideline, but I think sometimes people are too religious about SimCraft. I'm not that naïve about World of Logs data either - they can be skewed if people are really determined to get ranked.