Thanks. I was unaware of the Canon Watch story. I never go to that site, as they seem to mostly recycle @Canon Rumors Guy and other sites and publish anything regardless of whether or not it is credible.The Techradar "source" is a Canon Watch article that claims 45MP and quad pixel autofocus. Canon says the R3 will have next generation dual pixel AF so we already have reason to believe that at least half of the Canon Watch information is wrong. This calls into question the reliability of the 45MP claim from the same source.
After reading your response, I went to their site and they are now using the Techradar story to substantiate their story -- basically a closed loop. "We publish a rumor, someone else picks it up and then we use their repost of our story to substantiate our story."