In my experience, it's not uncommon. A lot of the schools I see have a Facebook page and not much more. Unless somebody in the club feels like maintaining a website, it's probably not going to have a website. (So that means you have to have at least one geek in the club! I can say that, since I'm a geek.) Larger schools, of course, are likely to have pretty good websites, developed by a professional.
The school my son and I attend has a pretty good web page (it's a big school), a Facebook page, and we just created our own YouTube channel. I'm the volunteer / stuckee who's in charge of the Facebook page and the YouTube channel...but if it wasn't for me volunteering, I doubt we'd have those things. Speaking of YouTube, we just uploaded some instructional videos for the Taegeuk forms on our channel, if anybody is interested.
Majest Martial Arts - YouTube