Facebook have been quite clever with the recent update that see the launch of the “Subscribe Button” for VIP’s Facebook pages. However, a little further down the document there is a part that shows of a new feature that will allow Facebook members to update their twitter feed directly from their Facebook page, apparently members have been asking this question for some time!
Therefore, the answer to the question “Can I update my Twitter followers from Facebook?” is;
Link your profile or Page to your Twitter account. Once you link your accounts, your Twitter account will be updated every time you post a public update to Facebook. Note: Only posts whose privacy you set to Public using your inline controls are eligible for this.
This shows that there is a growing relationship between Facebook and Twitter, which could be bad news for Google+.