There still isn't much there, and some of it is just unfounded. For example, while the author claims there are 'crazy levels of duck typing' in Ruby / Rails he

There still isn't much there, and some of it is just unfounded. For example, while the author claims there are 'crazy levels of duck typing' in Ruby / Rails he provides no such evidence of it and as noted by recent work from Aaron Patterson the vast majority of calls sites even in a very large rails app are actually monomorhpic (https://www.youtube.com/watch?v=6Dkjus07d9Y https://www.youtube.com/watch?v=6Dkjus07d9Y). But more important than this cherry picked example is the complete lack of this type of technical discussion, which is why I find the post very shallow.