Well, it’s quite a process to RT (retweet) someone or someone’s tweet as it involves copying & pasting the message and adding the tweeter’s id at the beginning or end of it – all within the 140 character limit! Phew!!
Now, the folks @Twitter have taken this into account, and have enabled (or integrated?) this RT feature on select (or elite?) Twitter accounts. So, just like the Twitter Lists feature, they will be testing this RT feature for some time, and then roll it out to those millions out there, after cleaning up the bugs, insects and dry leaves.
This would definitely be a thoughtful add-on by Twitter, for tweeters.
Update: You can get a glimpse of how this feature looks like over here.