What I find infuriating is that sites with a lot of frames or pictures require almost the whole page to load before you can scroll.

On some sites, I sit there waiting for:
Loading 1 of 112
Loading 50 of 116
Loading 75 of 122
Loading 122 of 128

The final count number just goes higher as the browser "finds" more things to load. Granted it's not "slow", but it's definitely not quick.