When you fire up the tap to tweet option, you only have the ability to add your 140 characters and send it to the moon. That’s what Twitter is after all, right? A big soapbox? When you tap to post, you can put in a status message that’s as long as you want. But more importantly, you can choose who sees that status.
Yes, Apple is now showing the masses that Twitter is for public shouting from the rooftops, whereas Facebook is the social utility that takes a little more thought before you hit the send button.