It would be interesting to know what the median has done. The average doesn't really tell much of a story, since there's a lower bound at 0MB but no real upper

It would be interesting to know what the median has done. The average doesn't really tell much of a story, since there's a lower bound at 0MB but no real upper bound. My guess would be that a certain subset of sites have gotten a lot bigger and pulled the average up, while the remainder have seen more modest growth. Anecdotally, it definitely seems like news sites and blogs have seen a pretty staggering increase in page weight in the past few years. It's not uncommon to see a ridiculous number of resources loaded from 30+ domains on a single site anymore (CNN.com, I'm looking at you).