Google’s Matt Cutts: Don’t Worry About An SEO Down Side To Responsive Design, There Is None
Google’s head of search spam, Matt Cutts, said don’t have to worry about there being a down side, related to SEO, when using a responsive design approach for mobile web sites.
There is no such disadvantage to using responsive design instead of separate mobile URLs in fact, there is no need to duplication of efforts when it comes to linking and PageRank, which does have a benefit when compared to using separate mobile URLs.
Here is Matt's video about the same,
