The fact that we’re seeing the same scalability issues in PHP, Java and obviously Ruby, tells us that the scalability problem is not about the language. It’s about the architecture.
Amen. I get really tired of reading posts and article which claim that this or that language does or does not scale for some obscure reason (it does not have the latest constructs, features, options, optimizations, etc…) It not about the language, it is about the architecture.
You only have to look around at the larger sites on the internet to see that there are a wide variety of languages and environments being used, and that if used properly can scale very well.