Google has a problem with following its own rules. Here's how you can prove it: Start a web browser on a desktop, visit www.google.com and search for something, and now shrink the window to the smallest possible size.
Notice anything unusual? Well, the page, for one, does not follow Google's own rules for their own search engine indexing. Webmaster tools says that website operators that run websites without responsive designs will get a reduction in PageRank. Yet Google Search results, probably one of the blandest pages to make responsive, is not actually responsive. Google: You don't get to dictate rules if you aren't willing to follow them yourself (just try plugging in a google.com search URL into that box) for all screen resolutions (including desktop browsers). So either make your search results pages fully responsive or back down from your position.