Last month, I presented High Performance Django: From Runserver to Reddit Hugs at DjangoCon US in Portland. My assertion was that Django, left to its own devices, does not scale. With the right supporting servers, however, it can scale fantastically. I gave a live demo of a Django site in multiple different server configurations with Docker on EC2, showing how each one affected performance.
For those who missed the conference, here's the video: