Google recently made more changes to its search strategy with the addition of Plus posts, but it might be too early to say whether or not getting more social will have a big influence on results.
First, some housekeeping: Related posts from your Plus friends will only appear in search results when you are signed into your Google account.
Google Product Manager, Sagar Kamdar, posted an example on the official Google search blog:
Let’s say I’m logged into my Google Account, and I search on Google for [uncle zhou queens]. I’ve heard a lot of great things about this restaurant, and we’re visiting NYC soon, so we want to figure out all the best eats in town. I also happen to have Andrew Hyatt in one of my Google+ circles. Oh, and it turns out he just made a public post on his Google+ account about Uncle Zhou in Queens:
So here’s how that will show up on my results page for the query [uncle zhou queens]:
In the same search-y vein, Google made plans in February to update its Social Search feature with content from users' friends on Blogger, YouTube, Quora, Flickr, Google Reader, Twitter and other social sites. At the time, users and analysts wondered about the usefulness of including such content.
Further, the Internet giant presently intends to reintroduce Realtime Search, a retired feature that once drew from posts on Twitter. "Our vision is to have google.com/realtime include Google Plus information along with other realtime data from a variety of sources," a Google rep said in July.
The recent addition of Google+ content both fits in with Uncle G's recent moves and further supports the Plus fan base, but it won't necessarily change Social Search. As explained by Search Engine Land:
Google Social Search continues to operate as before. Things shared socially at places like Twitter and Facebook by those you’re connected with may appear with annotations and rank better in results. [...] The main difference is, as Google’s post says, is that things you share on Google+ itself are now part of the mix.
If anything, the add is yet another piece of the Plus puzzle, which, as one Google spokesperson called it, is an upgrade to your Google experience.