Strange. It's the other way around for me (brand new Win7 box, Chrome, 16gb ram, fast everything, waited for all images to load before scrolling).
When I move the scrollbar on the "on" version, it flashes white and constantly drops images in and out until I let go or stop in one place. Then it whites out again next time I scroll. Quite distracting actually, like viewing the bottom part of a long page while it's still loading images.
The "off" version scrolls as one would expect, no flashes, no missing or reflowing content. Just like you'd expect.
PgUp/PgDown and arrow keys don't seem any different between the two.
When I move the scrollbar on the "on" version, it flashes white and constantly drops images in and out until I let go or stop in one place. Then it whites out again next time I scroll. Quite distracting actually, like viewing the bottom part of a long page while it's still loading images.
The "off" version scrolls as one would expect, no flashes, no missing or reflowing content. Just like you'd expect.
PgUp/PgDown and arrow keys don't seem any different between the two.