SLI 570 vs Single 580

Single GPU solutions are always better than cheaper Multi GPU solutions the cake benchmarks are a lie! When looking up any comparisons for multi GPU vs single GPU cards... or any GPU benchmarks at all, you have to look for benchmarks that show more than just the average. Multi GPUs will freaking fly at low load parts of any benchmark test, which will skew the “average” fps numbers that so many articles love to focus on. What you need to look for is a combination of minimum FPS and average, and in several different applications. 2X weaker GPUs are will more frequently and extremely dip in situations that you need your card to work the hardest, and numbers aside, actually trying to play games with this will show you a noticeable difference in smoothness and consistency.
No your 460s in SLI are not faster than a single 480, don't take my word for it, listen to this [H] reviewer tell you (link)

So my question is, will a single 580 really our perform a SLI 570 set up.... Just trying to CMA on everything before I submit my build. Thank you in advance !!