Joke or not, I have to point out that just because someone's screen resolution is 2560x1600 doesn't mean they have their browser that huge. Personally, my browser is never wider than 1100px. I do usually go as tall as the screen, but on a small laptop...
Mobile version didn't kick in on iPad, which doesn't do CSS position: fixed, so the footer ends up hiding some of the text, and makes the site unreadable.
Even #newtwitter gets this wrong. Space jumps down a page, all right, but one of the unread tweets hides behind the black header.
I haven't looked into this, but if anyone has a fixed position header on their project, they should look into overwriting the space bar action readability-style and calculating how far to jump down.