This looks to be your +1 code:
<div class="g-plusone" data-size="tall" data-href="$link"></div>
Compare this to your Facebook link:
<div class="fb-like"
data-href="http://www.adamtibi.net/06-2013/five-essential-front-end-tools-that-should-be-used-with-modern-mvc-projects" (...)>
</div>
It looks like the issue is the $link variable isn't getting parsed / exported for your Google+ button. Try and update the variable $link to render the same URL as your other social buttons.