Seriously, does anyone believe in 6D?
Well, yes and no.
The 5DII will go out of production eventually (it's now 4 years old).
When that happens, what is Canon going to do?
Keep offering the 5DIII at $3500 as the only 'affordable' FF option
Drop the 5DIII price to $2000 - same as the 5DII now?
Both are quite unlikely to happen in the next two years.
So, Canon will have to offer a new $2K FF camera after the 5DII gets discontinued.
They will have no choice, after Nikon announces the D600 next week (for $1800 - my prediction).
The thing is, this entry level FF camera will not be called the 6D and will not be announced this year.
So, this current rumor is of very low quality - even though the specs sound about right.