I think there are some really big differences when you walk down the list (at least in the last TechEmpower benchmarks I've looked at). It could be a factor of

I think there are some really big differences when you walk down the list (at least in the last TechEmpower benchmarks I've looked at). It could be a factor of 10x or 100x. It might even be 1000x between some slow solutions and the fastests. Managing 10 servers is perfectly ok, having to handle 100 servers would take a lot more work. A 1000 servers would require organizations to hire a lot more people and work a lot harder on automating server management, deploys, etc. I agree so far as that just using some standard language like C# or Java is probably good enough even though there might be another language and framework that is faster. I will personally stay away from php, python and ruby for larger systems.