I don't really have a problem with web apps doing incremental loading when it makes sense (Facebook, for example, or letting the user add a comment in situ), bu

I don't really have a problem with web apps doing incremental loading when it makes sense (Facebook, for example, or letting the user add a comment in situ), but many many sites would be better off just loading documents instead of moving to an application framework. Take for instance TechCrunch.com vs Wired.com, Wired is much easier to use because it acts like a website. Yes, it does full page refreshes instead of showing a full-page loading spinner, but it behaves more consistently and doesn't require the user to learn new UI paradigms.