"If you still do not have a responsively designed/mobile-friendly website, you better get on it, and get on it fast," said Collin Colburn, an analyst at Forrester. "But this is something that you should have -- if you have not already -- been working on."--Computerworld.
http://www.computerworld.com/article/2908295/how-to-prep-in-7-steps-for-googles-mobile-search-change.html
http://www.businessinsider.com/brands-affected-by-googles-mobile-friendly-algorithm-search-update-2015-4