Google Social Search begun showing the content from your social circle to a search results page -- appears that Google's trying to make Social Search faster than it's been so far. As fresher tweets starts appearing, in this case, Google is showing a tweet that was less than 45 seconds old. This is obviously a far cry from Google Realtime Search, which is focused on freshness and not targeted to your social circle.
Google has confirmed this in today's blog post, saying:
"This week we've added real-time to Social Search, so you'll find the freshest tweets and other updates from your friends right on Google. Here in the Bay Area, everyone has been excited about watching the Giants in this year's World Series. With our improvements to Social Search, now when you search for information about the game on Google you can see right on the results page if your friends are watching. Just look for the heading "Results from people in your social circle" to check it out."