Froknowsphoto has uploaded some interesting RAW files from the R. He had to convert them to DNG so we can all play with them but from what I have briefly seen they are nothing to write home about.
https://froknowsphoto.com/canon-eos-r-raw-files/
And the accompanying YouTube video.
https://froknowsphoto.com/canon-eos-r-raw-files/
And the accompanying YouTube video.