Am I late to the party, or is this really new? One major headache that I used to have is to quote and RT on twitter-on-the-web. It has been there on the android native twitter client, but not on the web. I know quite a few folks who use other twitter desktop clients, just for this functionality.
It was a pleasant surprise to see this over the weekend. Thank you Twitter.
And what more, there is a bonus too. Your quote gets 140 characters. Yes, over and above what the original tweet was. Is this awesome or what? In earlier times, there were twitter guidelines to use lesser number of characters in a tweet (<140), so that people can RT you and write something. Now that is gone. It is a win-win for the original tweeter and the one who RTs.
Now that is what I call a UX win.