With Ruby, I have to spend, at least 3 months learning the concepts behind the Rails framework and what the article OP mentions just to get to that 20 to 30 minute mark.
If anything it's all meaningless, and what everyone should understand is that while the closer you are to the web server itself (CGI+PHP, Node.js, Classic ASP), you can quickly create any type of code, at the loss of organization and order.
In frameworks (criticism of Rails can also be attributed to Wordpress IMO) you have a much larger ramp up time learning the concepts and conventions, and once familiar, are able to LEVERAGE those patterns.
But don't bother me with PHP vs Ruby. I run SSI on nginx. It's not even in the same league as those two. BUT it's even easier to spin a basic 5 page website. All tools have their specialties.