I doubt that there's a universal rate - a universal mean (within the context of a shared language) makes more sense. Every conversation acts as its own handsha

I doubt that there's a universal rate - a universal mean (within the context of a shared language) makes more sense. Every conversation acts as its own handshaking algorithm from which context is derived, and contexts will vary greatly in terms of amount of language required to convey concepts. Jargon rich conversations between experts have the potential to transfer information at a rate far greater than average.