i thought maybe it was time to go to sleep because this guy's site looked blurry and was unreadable to me. after looking at his css, he's doing a text-shadow on all of the body text. don't do that, people.
I totally agree. The last months more and more pages are trying to have a "unique" look by messing with the fonts. The Readability tool is almost worn out here because of that.
I was wondering why the new interface got sluggish after a while, I just figured it was at the expense of loading so much data at once, but even then it seemed odd. Glad Twitter is active in trying to keep it's interface fast, though I wonder how much faster it would be with something like Websockets.
Scrolling is still very slow for me until the top section is off of the page. I'm referring to everything from "What’s happening?" through the Timeline - Lists tabs.
If you look at Firefox memory consumption while browsing Twitter, you'll see the main culprit is, like always, DOM operations (repaint/reflow particularly). Solution: use Chrom{e|ium}.