Good read. Makes me want to learn Ruby!

One query though: All that talk about the shiny new hardware and Ruby being slower in rendering pages under 50ms and the comparison to StackOverflow; isn't that a little unfair? I am trying to understand better and not making claims of knowing better than Jeff. :)

How can you compare a completely server side solution (in ASP.NET MVC) to an almost completely client side solution (in Ember.js), which only uses the Rails API for the backend alone and say .NET is superior to Ruby? Especially when the page rendering time seems to be the only profiled checkpoint for the performance.

Wouldn't JavaScript and the whole Ember.js be adding to the slowness at all?