Tumblr officially acknowledges its hero:
Haha but seriously..... some bigwig lawyer signed off on these so that they could be up to snuff with Yahoo policy. Tumblr's always had a little bit of jokey fun language in its guidelines, but now it seems a little more like a Cool Dad on a skateboard and backwards hat trying to convince you he's still your Cool Dad. A lawyer in JNCOs.
Anyhoo, there' still some good zings in there. A 17 year old Doctor Who fan named Josh put a list of highlighted screengrabs of the best of the new language.
Finally, "the alien beauty of Benedict Cumberbatch" is written into official Tumblr doctrine.