[ken]

Yet it's still loaded with hundreds of KB of custom fonts, because the designers would rather I look at a blank page for a couple seconds than gaze upon their design with a typeface that isn't exactly the same one they have on their computer.

My resolution, window size, color settings, text zoom, font rendering, etc, are almost certainly different, too, but at least they've made the page more than twice as slow by forcing the correct font.

[zamadatix]

It's not so much the size as the way the font was defined and the trash latency/TTFB of whatever they are hosting it on.