Let's not make excuses for them. I wouldn't say that it says "nothing" about the practices and priorities oriented around (and consequently through) the project, especially when the website apparently consists of a single small static HTML page.
What does open source have to do with the reason your site was down?
I think that impugning the professionalism of someone's work because their project's home page was down once is pretty darned personal.
It says nothing. All servers go down from time to time. This one was up when I went to it before, and it was up when I tried it again just now. You say it was down for you when you visited it. Fine. That happens sometimes.