What's the Best EC2 Instance Type for Rails Apps?

Do you ever look at the list of Amazon EC2 instance types?. Those are sizes of virtual machine you can rent to run your code on. Well, okay, they're groups of sizes, since each one of those headings has a bunch of different sizes of VM...So what type of EC2 instances should you run your Rails app on?The answer is simpler than it looks.Do you love numbers? I love numbers. Do you hate numbers? Skip to the bottom, there's a nice summary paragraph. Do you really really love numbers? There are raw data dumps including all my intermediate results.