Ian Bicking: the old part of his blog

Comment

Web Frameworks/Servers differ by features and performance.

But there's a common ground to all, in that they accept requests and deliver content. Nowadays most frameworks also feature cookie-handling, authentication and session-persistence.

I see web-applications explicitly adressed in this PEP, and therefore I also see this rather as a unified interface on top of which I can write web-applications, then as a way I can deal with web-servers as a framework writer.
Comment on WSGI Sample Apps and Middleware
by Florian