Ask HN: Could it be that Ruby doesn't scale on HR?

Where I live (Israel) RoR arrived roughly 5 years after it spread in the US, I always knew it's hard to find RoR develoeprs in here. But than I came across this: http://gun.io/careers/1789/it-seems-it-is-easier-to-find-a-real-ruby-than-a- Would it be right to assume than, that good Ruby developers are just extremely rare all around? If so, what do you think this means for a project expecting to require many resources? and does it mean that in the enterprise world, Java/C# are there to stay, not only in legacy but also in newer and future projects?