Here's where you're mistaken. Google is only compromising the relevancy of their results for a few months. After that, with such a strong (unethical) promotion,

Here's where you're mistaken. Google is only compromising the relevancy of their results for a few months. After that, with such a strong (unethical) promotion, Google Plus results will be THE most relevant, because users have switched to it. It's a self-fulfilling prophecy.