I think tweets disappearing from LinkedIn streams is a good thing. It cleans up those streams quite a bit. David Graham has a few thoughts about this little breakup which are worth reading. David is a local LinkedIn guru so he is someone you should pay attention to if you rely on LinkedIn:
I wonder how many people around the world are hastily changing their social strategies in reaction to this announcement. While I understand the reasoning about the “severed” relationship, I do not appreciate how these decisions are made and carried out without any due consideration of the millions of users of these social networks (many of which are paying users).