I will contribute to that wake up call. Once I "upgrade" from my current 7D to FF and need to sell my EF-S glass anyway 10-22, 17-55, 60 Macro I will also sell my EF glass 40/2.8, 50/1.4, 100/2.0, 70-200/2.8 II and take my money elsewhere, if all Canon has to offer is overpriced and underspecced cr*p.
Then good luck and enjoy the grass that is greener on the other side...
The 6D at 2100$, it's still a lot of money, but it is the same as a similiar speced D600. (D600 has more AF-Points, and bigger zone metering, built in flash, dual card slot, while the 6D has WiFi and GPS). But you can be sure, that that price will drop, like the one of the 5D III is starting to do. Early adopters pay extra. As long as there are people around who think they need the newest eqiupment the moment it is announced, so long companies will be able to charge them extra. The 6D will go as low as 1600$ within 2 years, which is a fair price for such a camera.
And no, Canon has not really a problem with their sensors, at least not among people who take pictures, instead of reading dxomark, and comparing the numbers as if they were Horsepower and 1/4mile times.
Shoot at ISO 100 and the D800 will give you the possibility to take details out of underexposed parts because of its high dynamic range, but shoot in low light, and the 5D III will give pictures with much less noise. You decide what you prefer, and what your needs are.
True, Canon lost its advantage it had over Nikon in the sensor department. And Sony makes great sensors (not cameras, so far). But the real looser in this game won't be Canon, it will be Nikon. Sony uses Nikon to help them finance their chip production and development, because alone Sony would be nowhere near Canon volume. But if Sony market share grows, they will not need Nikon any longer...