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Does Google+ drip-feed posts to make it appear more active?

Peter Sitterly's profile photoTim Acheson's profile photo
They drip-feed posts to make it possible to do the animation even with slow feeds. By being able to do the animation, it is a hint to the user that it will be updated in real-time and will not need a browser refresh.

It's not much different than the "rubber banding" effect on mobile devices. It's not to trick you into thinking there is more content just off the screen when there really isn't. It's just to give you an indication that you've reached the end and your phone hasn't just locked up or isn't picking up your gesture.
+Peter Sitterly It's annoying. You start commenting on a post, then it  moves down off the screen. Bad UX design.
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