For example, they're using Apache as a reference point, but Apache does so much more than their code example. For one thing, you'll want to try disabling .htaccess support and static file serving so Apache doesn't actually hit the disk, like their code example doesn't.
I've found it trivial to make Python perform on the order of dozens of millions of requests per second, and I can keep scaling that basically indefinitely. But all I'm really testing, as is the given code example in the article, is a bit of looping and string manipulation.