> Now, if you tell me you treat Google+ differently in a way that blocks link juice, blocks anchor text and doesn't pass link equity, then I think I would have to rethink my thesis.
> My argument is that Google+ as a platform passes actual SEO value, and I don't think this is a bad thing or something that needs to be debunked.
Huh? You first say it doesn't pass directly in the algorithm ("blocks link juice, anchor text, and equity"), but then argue that it does ("passes value")? What part of the argument am I missing here?
If you're arguing that overall exposure to content goes up because social media sharing, then I'd be inclined to agree. Overall exposure then translates to better SEO because links are being used more often outside of non-seo-algorithmic social media (for example in blogs), hence the correlation.
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.