A Google+ post passes SEO benefits (through linking) independent of the number of +1s it has. So although Google doesn't use +1s directly, it does use the link signals found naturally in the Google+ post itself. Because these link signals are by design blocked by Facebook and Twitter, this makes Google+ a superior platform from an SEO perspective.
Perhaps I have missed something here, however does this mean that a Google+ post that has zero +1s will pass the same amount of link juice as one that has fifty +1s? I guess this would be dependent upon the author that posted it, so let's assume these two posts are both by you, Cyrus Shepard.