You can't tell right now if a post has a Twitter link. If …
You can't tell right now if a post has a Twitter link. If you show the icon only when it does have one, then we can tell immediately if the Twetch is also a Tweet.
You can't tell right now if a post has a Twitter link. If you show the icon only when it does have one, then we can tell immediately if the Twetch is also a Tweet.