Infinite scrolling like this works pretty well if you want to do scrolling for, say, search results.
It's all around horrible for something like Twitter, IMO.
The problem with Twitter is that it's conversational, and it's showing the newest part of the conversation at the top. So instead of having a nice conversation history:
Hi!
Hello to you good sir.
How are you doing today.
I'm fine.
You get:
I'm fine.
How are you today?
Hello to you good sir.
Hi!
...and you lose the navigation state, so it's impossible to tell where you were at last on Twitter except by memory.
Twitter already fixed this in iOS (you always apparead where you left so you read everything in order), is just taking them a while to fix it in the browser.
It's all around horrible for something like Twitter, IMO.
The problem with Twitter is that it's conversational, and it's showing the newest part of the conversation at the top. So instead of having a nice conversation history:
You get: ...and you lose the navigation state, so it's impossible to tell where you were at last on Twitter except by memory.tl;dr: don't copy Twitter's UI. Please.