Being a little sensational aren't we? while I'm no fan of Crossfire or even Sli for that matter I've never have been left with those feelings.
I agree. I've only been using Crossfire (2x 7870) for a couple of months now, but I've come to believe that most of the dire warnings about microstutter and bad scaling are simply not true out in the wild. Far Cry 3 is the only game so far (and I play a lot of games) to display this mythical microstutter in any noticeable way, and Rivatuner's frame limiter killed that with no issues. There may be some crazy stutter going on in graphs and frametime charts, but it hasn't seemed to translate to actual end-uder issues for me very often so far. Meanwhile, I've seen FPS gains ranging from 50-100% on even higher settings than the single 7870 could swallow. All told I'd say I'm thrilled with it.
I'll admit that I generally don't buy PC games at release, so my positive experiences are likely partially based on some substantial post-release patching. I can't speak to how the games performed on release, but let's be honest and say that purchasing a game the day it comes out these days is likely to net you little more than a bunch of frustration regardless of your equipment. Sad but true.
Sure, a single GPU would be ideal, but the truth so far in my experience is that CFX works just fine the vast majority of the time and provides a HUGE performance boost for far less money. To imply that CFX is always a bad thing is just not true.