And you can post on the page of your profiles, and on fan pages (all of which you are an administrator) - it is very convenient. Now a startup, for example, do not need to waste time on maintaining a page on FB - you can only write in twitter.
What does it mean?
IMHO, this means that Facebook has recognized the fact that Twitter still easier to write and more people are doing just that. Probably, we have to be an outflow of traffic from the mobile client fb, well, or they do not have the expected traffic growth.
So what can be considered a generally accepted fact:
Twitter - the most convenient and popular tool for expressing their thoughts.
Here it is worth noting that, along with the expression of thoughts and is interacting with other people. So, too, this communication will be more and more, because this is convenient: in one place and to record thoughts and communicate with people. I think twitter is more convenient to make direct message of his own, that it was more like a messenger - if they can still othapat audience.
Do you agree?