My R5 and 800mm f/11 just arrived in two humongous Adorama boxes. I ordered from Adorama at, I think, 8:05 am 7/9.
Camera looks great, and the battery is charging. It's been a while since I've purchased a Canon product, so seeing the jet black Canon boxes instead of the white and red ones of yore, was slightly unsettling (I guess I'm a traditionalist). The body is very "DSLR-like. I wouldn't recognize it as mirrorless by looking at it. It is noticeably larger than my A7rIII but not massively so. It is much smaller than my D850 (yes, I have entered the danger zone of three systems, but there is no way I'm giving up my 500mm pf anytime soon!). I was never one to complain about Sony ergonomics, but I suspect that using the R5 will feel a lot like coming home.
I was distressed to see that Canon is continuing its old practices of not including a lens hood with non-L lenses, grrr! B&H has one that fits the 800mm for $54. While not horribly expensive, if I keep the lens, I'll wait for 3rd parties to produce one. No tripod foot either. Instead, you can screw the tripod directly into the lens. it is extremely lightweight.
I need to get work done today, so that maybe I can go out tomorrow morning and see if the 800mm can keep up with osprey.