From the demo I saw, it worked as well as watching 1080p YouTube in a third world country. Someone figured it was smart to do server-side rendering and load your document as tiles using a technology designed for maps (the same as used in OpenStreetMap, and there it works well, because that's actually a map and not a document). The person argued WiFi was bad, but when typing on a 100mbps symmetric connection there was still a noticeable delay between my keystroke and it appearing on screen.
Edit: to everyone saying they also can't watch YouTube 1080p without lag/buffering/whatever: perhaps it's not perfect anywhere outside the third world, but I could imagine that there it would suck even more. It's just a comparison, not a research paper.
Edit: to everyone saying they also can't watch YouTube 1080p without lag/buffering/whatever: perhaps it's not perfect anywhere outside the third world, but I could imagine that there it would suck even more. It's just a comparison, not a research paper.