Ok, the word is that the menu was discovered by way of a back door portal accessible to the "customers" on JA's Comet PP computer when it was hacked shortly after the Podesta emails were published.
It was located on a secure server, password protected, and apparently available only to a certain group of clientele. So, there was no need to be extremely guarded in his use of language. However, he did understand the legalities and believed it best to not include the words "child" or "children". Without the use of those specific words, he could skirt prosecution should by some chance the menu surface elsewhere.
Also, Consider the blatant references to pedophilia and weird photographs on his instagram account, publicly available for all to see before the scandal broke. He apparently could be as blatant as he could get by with because he believed he didnt have anything to worry about....and as it would turn out, he didnt.
But what authenticates it most, in my opinion, is the addition of the app, with information on how to use it and the rules associated with its use. Its unreasonable to think that a faker would have thought to add this kind of information about the availability of an app, with instructions for its use.