It was determined through testing that people who see more text status updates on Facebook are more likely to write status updates themselves. Facebook says that its initial test showed on average 9 million additional status updates were written daily when users were shown more text status updates from friends.
Testing showed that this behavior did not apply to status updates from Pages, which is why the latest update to News Feed treats them as an entirely different category as opposed to text status updates from friends. Facebook says that this tweak will allow it to show people more content that they want to see, from the people they want to see it from. It cautions Page admins that they can now expect to see a decrease in the distribution of their text status updates.