I find it strange that you refer to comments starting with # as Ruby-style comments.

Or any other language that denotes comments with an octothorpe, but I opted for brevity.

I'm pretty sure Ruby is bigger than Perl and sh put together now, at least in mindshare.

python and PHP also support # for making comments. It could be argued that python has just as much if not more mindshare than ruby. :)

I agree. I think "Python-style comments" would be just as reasonable a term. My impression was that the comment I was responding to was objecting on historical grounds, since Ruby and Python borrowed that comment style from Perl, which in turn borrowed it from shell scripts.