No, marginally DOF and tesselation on sucks framerate wise on both 480 and 5870, DOF is the worst effect i've seen, massive framerate hit for somethign that just blurs part of the screen, DOF in that sense just doesn't work as an effect. Unfortunately in real life you can move your eyes to look left a bit, or focus where ever you want at any given time without moving your head. Adding DOF to a screen, which chooses a single point to focus, doesn't add realism, just blurryness where it shouldn't be.
The game simply looks worse with it on and runs fine with it off. at 1920x1200, full settings with dof and tess on my 5850 overclocked gets somewhere like 18-20fps average, regularly dipping into the low 10's and its awful, turn DOF off, which actually increases the IQ, and my framerate jumps to around 45fps average maybe, lows of 25, highs of 60+, turn tesselation off, which you honestly can not at all see the effects of as you actually play in 99.9% of situations, and you go to around a 60fps average. Its entirely playable, and really does look quite good, unfortunately the game sucks utter balls, but looks purdy doing it. The 480gtx is faster, but not massively. Keep in mind its a 480gtx launch title, it uses every Nvidia trick in the book and given the lack of IQ improvement with DOF, and the utter waste of tesselation usage in the game most people feel its a game coded to run as badly as possible to make the 480gtx shine as much as possible on launch.
If the 480gtx was genuinely faster and DOF and Tesselation were massive IQ improvements that warranted the framerate hit(which is large o nthe 480gtx also, just slightly less so) that would be one thing, but DOF reduces IQ and most people prefer it off, tesselation smooths things like, other characters sleeves and cuffs a bit, the odd helmet is marginally rounder, actually walking around you can't see these very minute details, the difference between tesselation on/off in uniengine....... Metro doesn't come even close to that level of difference, and few games will for a couple years.
As for the Crysis benchmark, keep in mind that the 480gtx, is also using a hex core 980x, not a 920. Likewise, the minimum fps on the 5870, was 22(albeit at a lower res) the min fps on the 480gtx, was 0.29fps, I wouldn't call that playable, change both to 4xaa and you've got a perfectly smooth game at the same res on both setups.
Bee, you don't have the same fan on your 8800 and 260gtx, 70% of 20,000 rpm, and 70% of 10rpm, would offer VERY different noise levels.
Unfortunately as I said, its down to actually experiencing it or taking the majority word on the matter. The vast majority of reviews said it was significantly louder than a 58xx card, and a 285gtx/280gtx, etc.
Likewise, you can't compare fan % and noise to AMD, my 5850 is basically silent up to about 30%, it runs at 24% idle, and I can't hear it over case fans, around 34% it starts to become louder but not bad in any way, just slightly different pitch above my very quiet case fans. At 45% its irritatingly loud and above 60% its just unbearable, overclocked and overvolted I've never seen it go above 38% in any game yet though.
% comparisons aren't really useful unless it has the same fan, even then the same fan can be programmed to do different speeds. One card might choose a fan's maximum speed at 100% is 5k rpm, and another company using the same fan might decide 100% is 10k rpm.
The only hard evidence I can point to is the videos on the 480gtx review on hardocp.com then you've got another big problem, does every brand use the same bios, same fan settings and will 100% be the same on every 480gtx you buy, who the heck knows