Real time, as in a 1:1 ratio between the time it took him to write it and the time it takes for you to see it played back. Not as in live, where you see it as he's typing it.
Are you sure? It feels more like edits are being played back at a constant rate, without consideration of human delays.
But still super interesting
Yeah, if I was writing the essay there definitely would be many more pauses between each sentence.
No, that's not true. The keystrokes are played back at a constant rate with no breaks.
I'm still waiting for XEP-0301 to become ubiquitous (which transmits key delays with text, and would be closer to what the GP thought he saw) - I really miss this feature in chat systems.