The "all bodies" is referring to all Canon bodies... Canon have just never had decent galleries to show off their gear, I don't know why but there you go!
Yeah, they seem keen to say the 1DX is a stop better so that's still their top of the line offering. Although I've read so much the last couple of days that might not actually be a line from Canon!
No, I agree that both Canon and Nikon are normally pretty bad at putting low quality samples in their galleries. The have even been known to outsource their advertising to people who used Sony bodies to generate marketing images.

We do have to wait for official reviews to draw final judgement but I would say that the current samples should make one very cautious about pre-ordering.
The question on why Canon just didn't use the 18MP sensor from the 1DX sticks in my mind. The only answer I currently have is to purposely cripple performance and have a lower production cost sensor. Hopefully I am wrong but I just don't understand Canons design choices here.