This is not actually a Google+ problem. It's a social networking problem. Facebook.com, linkedin.com, and google.com are all preferred over anyone's personal site.
My name is a good case study because it is, as far as I know, unique. Google is currently doing the "right thing" but previously it had been returning my Facebook page above my personal website. That's broken, but it has nothing to do with G+, and everything to do with the way all search engines rank people. (Bing does the "wrong thing" with respect to my name, and shows LinkedIn first. DDG also throws in two random things from years ago in before getting to my modern website.)
Search is a hard problem, and the result is subjective.
My name is a good case study because it is, as far as I know, unique. Google is currently doing the "right thing" but previously it had been returning my Facebook page above my personal website. That's broken, but it has nothing to do with G+, and everything to do with the way all search engines rank people. (Bing does the "wrong thing" with respect to my name, and shows LinkedIn first. DDG also throws in two random things from years ago in before getting to my modern website.)
Search is a hard problem, and the result is subjective.