[userbinator]

I agree - the sizes of pages have increased, but it doesn't seem at all like the actual content in them has grown nearly the same amount. If you don't include images, then realise that 1MB is a lot of text.

The first point everyone should know about caching is to keep things as small as possible, and in fact, loading a tiny page over the network could even be faster than a locally cached but huge page that the browser needs to spend time parsing and rendering.