wow. Over what time period in single shot? Back display on or off for displaying settings? Could the chimping really make so much difference? Considering having my 5D4 checked, too bad it's out of warranty already. I carry 6 charged batteries around with me, seems that is many more than other people use.I once sent back a battery burner within warranty period. It of course came back as “within specs”.
Photons to Photons says the 1Dx III has between a half and one stop more DR than the EOS R at base ISO. It seems the R6 uses essentially the same sensor as the 1Dx III, and it seems reasonably likely to me the R5 and R6 use the same generation of sensor technology (given they have been released at the same time, and the cameras share things like a common max FPS, albeit at much lower resolution for the R6). I reckon that all points to the R5, R6 and 1Dx III having similar DR, and "about 1 stop" better than the EOS R at base ISO being about right.
So, do you get mad at the hammer when you miss the nail and hit your thumb? Seriously, these are tools with strengths, weaknesses, and limitations. Some of us feel Canon has delivered a "compelling" reason to buy their new gear. We may be right, we may be wrong, but you clearly do not have an understanding or appreciation of what they have delivered. The R5/R6 should clearly match and in some cases exceed the capabilities of the Nikon & Sony offering. Every part, software feature and capability cost money to design, develop, manufacture, market and support whether or not is required by all users. If yo duo not believe it is compelling, then you are basically saying nothing in the current (and next) generation is worth you money. If that is the case, enjoy your current gear or get a new hobby/profession. I know a little bit about technology, sensor production - all of the current offerings are pushing up against limits in both physics, material science and technology that will require significant R&D to provide a truly significant breakthrough. If you can't capture meaningful images with your current gear and the new offerings, maybe the problem is not the gear.
I've watched way too many interviews with Rudy about the new cameras by now, but he is very consistent in saying that it's an 'effective 1 stop' improvement. That, to me, leaves a lot of room for interpretation. I think it's the 0.65 stop you mentioned, plus another 0.35 or so JPEG/HEIF noise reduction improvements in the Digic X.
I'd love to be proven wrong
Apart from the cost savings on the top LCD, EVF and rear screen, the Canon Log 3 with the extra dynamic range will be very welcome for video shooters for the R5, no such things promised for the R6.
over 1-4 hours. depending on the gig. back display settings: off, display image: 3 sec ( default settings..)
I agree. Having the AF directly on the sensor improves things significantly. My 5DIV was never as accurate as my EOS R is now... and that's after it was cleaned and calibrated by Canon service a couple of times..
I'd agree with all of this having both the 6D MKII & the R which I hope to replace with the R5. Video doesn't really bother me; only ever use it for the odd clip on holiday for which i can use my phone anyway.
Yeah, but that´s user error, not a camera fault!
They did show some pics that are perfect in sharpness and color. Of course it´s quite difficult to evaluate picture quality from pics in a video on youtube, but we do have an idea how great still image can be from the EOS R6. And it looks quite promising! 
The M6II is a huge improvement, but the lack of stabilization in the decent EF-M lenses still gives the phone an edge.
Yeah, but that´s user error, not a camera fault!
I think there will be a lot of stills (nature and sport) photographers that will be very interested in the 45mp at 20fps. I'm impressed with the 12 fps with the mechanical shutter as I already know that will likely not have any issues and is a significant increase from any 5 series body in the past. That is enough for me to buy this camera considering the buffer seems to be pretty reasonable as well. The 20 fps will be an extra bonus depending on the speed at which the data can be taken from the sensor. I'm not expecting this camera to match the Sony A9 since I don't think this is the same type of sensor, but if it can capture birds in flight without warping wings too much this could be very cool.
