It's not about claiming to be something revolutionary. It's about the message. The fact that I don't know about Modula and Ada says nothing. We live in the world of internet. I can read the wiki page of those lang. It doesn't make me "knowing Ada/Modula"
Of course, all languages built on each other and if I would like to know who influenced Nim I'll read the wiki. This is not the information that can be valuable for me as a user in the first place. This is my point :) With all respect to Ada, Modula, and other great languages.