What's different about them? I haven't paid any attention to it...
They instituted a new privacy policy across all of their sites, instead of having different ones for each. Basically the new privacy policy is this... You don't get any. If you have a gmail account you've gotten several emails about it.
I do think Google has gone to far with this, but I haven't switched yet, I have had a Gmail account from the beginning and have several other email addresses set up to forward to it, switching would be a major pain in the butt. For now I'll live with it, and just remember to delete my history, and log out once in a while.
I'm not a paranoid person by nature, but I do value my privacy, I'm not worried so much about what Google will do with the data, but what others who legally or illegally obtain it may do with it. How long before some government or law enforcement agency starts pressuring Google to release all their data, without warrants, on certain individuals to them? Then DHS is knocking at your door saying "Excuse me, we have some questions about your internet activity." Google has already shown they are willing to cave to government demands (see how Google got into China). There are already assaults on the 4th amendment, Google is has made a tool that would completely violate the 4th amendment, should it fall into the hands of government, and I have no doubt some agencies will try to use it.