This is an interesting observation, and it has echoes of Greenspun's Tenth Rule. I'm not sure exactly how true the statement is, but I suppose it used to be (or still is?) the case that the same thing could've been said with C in place of Ruby.
It should be noted that sufficiently popular languages incorporate as many buzzwords and design patterns as possible, which I suppose can be accounted for as 'features'.
(Excellent article, by the way).