Wikipedia says "Marketing refers to activities a company undertakes to promote the buying or selling of a product, service, or good." Julia is not a company; I think what you're calling "marketing" would better be labeled "user enthusiasm" :-)
http://www.thejuliafoundation.org/
I didn't think they were, but now it makes sense why Jeff Bezanson's voice is so soothing.
If anything, I feel that the Julia website and manual focus more on technical computing than they ought to and could stand to spend more time on general computing matters for which the language is also well suited. I’ve been meaning to write a blog post entitled “Julia is a General Purpose Language” for a long time. Which I suspect you would take issue with, but that’s ok.