Well, just to toot the Surv Hunter's horn a little bit:
I am Surv myself these days.
Talent build Toting the Sunfury bow, a few epics (have had too little online time to gather up two Primal Nether's for my boots) and a few selected enchants, I can throw around 800ish Agility around in a raid, depending on how much I could afford to throw after Elixirs/Flasks.
And I outDPS anything but two of the Guild Rogues. They are constantly higher than me, and the rest of the DPS people are going up and down next to me. As the only Surv Hunter in the guild, I was kind of thrown when I found that my subordinates (I am classleader, and the rest is BM) had lower DPS than me. After spending a few minutes with each of the Hunters under my care, I found that two hadn't installed an Autoshot timer, and thus lost some DPS from delayed Autoshots/Steadyshots. One of my Hunters had a bad connection and couldn't really keep the delays gone anyway. And the two last Hunters got a Warning when they claimed they could just sit back and Autoshoot. That's what they used to do in BWL after all.
My DPS stands back for
no-one! I may be lower on the Damage Meters than a nonlagging, good BM Hunter. Those two Rogues might outDPS me. But I do more than my share, and the raid has never lacked the necessary DPS from my end. Anyone claiming Surv isn't a DPS build, is thinking way too much about Min/Maxing their specc, when the true difference is so very very low.
When deciding on specc, don't give a damn about DPS. Don't care where on the Damage Meters you will end up. That is not your job in a raid, unless you are a Rogue. And even they will have other tasks to consider depending on bosses. We are Hunters. We provide safety to the Raid. Our Misdirection, Expose Weakness/Ferocious inspiration, our three seconds OH SHI~ tank at our side, traps and general overview of the fight/tracking. Hell, if the **** really hits the fan and our healers are running out of mana, I can Distracting Shot the boss and Deterrence tank him for long enough that the tank has bandaged/popped a potion, and Feign the aggro back to the tank.
Never think in DPS terms when choosing a specc. We are waaaay more than DPS. The only thing to consider, is what kind of specc will your gear/gearplans support.