6D is an amazing value option for Canon shooters and underlines how little an "upgrade" the 5DIII was.
LOL. Yes, the 6D is a great value, an entry level FF body slightly better than the 5DII and costing less than the new top-of-the-line APS-C body. But to call the 5DIII a 'little upgrade' to the 5DII is utterly asinine. Much better AF (the first time 1-series AF trickled down to another dSLR line), significantly faster frame rate, better metering, better build, dual card slots, basically, almost everything about the 5DII was substantially improved. Everything except the sensor, which got only a modest improvement...but no one complained about the 5DII's image quality, a tiny number of lens cap-shooting Internet forum people notwithstanding. Maybe it was a 'little upgrade' if all you ever shoot is static subjects at base ISO with the camera on a tripod...but that means you're in a tiny minority of dSLR buyers to which Canon doesn't really need to pay attention.
I think the AF and the FPS upgrades on the 5D3 were lost on a huge chunk of the market, especially wedding and portrait photogs. Actually i think the most noticeable improvement for me was the LCD screen. At the end of the day, the image quality didn't really change much and Canon was asking for a hefty price increase. I guess you could argue that it wasn't a "little upgrade", but arguing that it was a major upgrade seems equally absurd.