Turn's out: he really is. RSS was created by Ramanathan Guha, Dan Libby and Eckart Walther at Netscape first as an RDF Site Summary but only Guha and Libby are named on the original specs. That format then got transformed into a pure XML-based format, then merged with Dave Winer’s format, who then became chief author for the following RSS 0.9x and 2.0 versions. And of course in parallel there were the rivalling RSS 1.0 specs (again RDF based) and the Atom effort.
Should anybody be interested in now obscure histoy: Twobithistory did a longer retrospective of the feed wars:
https://twobithistory.org/2018/12/18/rss.html
And the (slightly disputed) RSS Board, its own fractal in the RSS history, keeps copies of the original specifications:
JeanKage•3h ago