To all you complainers, whether you complain of Canon or Nikon or anything else, if you're going to blame anyone you should blame the purchasers who buy the over-priced, under-performing products. If you want Canon to put better sensors in their products, and if you want Nikon to implement better speed and ergonomics, then you need to get a bunch of people to refrain from purchasing the current models, or to buy Pentax.
This is the problem in a market with limited competition due to brand loyalty and people being stuck to their equipment proprietary lens & flash systems. Many will bite the bullet and say "In comparison to my lenses and other equipment $1000 more for the 5d3 isn't that much, I'll pay it and forget the price as fast as I can". If the 5d2 wasn't around anymore maybe I'd do the same.
About "complaining": Maybe people with 1 post saying "I'll get a d800 instead of the 5d3, hahaha" are complaining or trolling. But there is a difference between this and pointing out perceived problems and wanting to discuss with people about this to see if one's opinion makes sense - and I certainly build my opinion about the 5d3's strengths and weaknesses reading threads like this because reviews don't tell the whole story.
Whats with all this mirrorless garbage, people?
It's *currently* garbage. In 10 years from now (or more?), you'll have an electronic viewfinder you can hardly tell from an optical one, the shutter sound and speed limitations will be gone, and the af system except for the very pro top will be ok. And you'll have features only an efv can deliver: "I want to track the red bird, please", focus peaking right and so on in the viewfinder, night-time shooting through the viewfinder, ... there are many possibilities many people would throw away their 1dx this second - if they'd have gotten it yet :->