Seriously, does anyone believe in 6D? All of these have been anonymous web "tips", aka wishful thinking. Canon will not release a cheap FF until either 5D3 sales stop, or Nikon officially releases and proves that cheap FF will take off enough to make money.
There will be no 3D, 6D, or even 7D2 anytime soon. Canon, is done with 1DX, 5D3, 7D, and a bunch of rebels for 2012. Their sales have been successful with those... why bother when all you have to do is release a second rate sensor and everybody starts drooling all over.