Google’s Matt Cutts: Don’t Worry About An SEO Down Side To Responsive Design, There Is None

In a video released today by Google’s head of search spam, Matt Cutts, he said you don’t have to worry about there being a down side, related to SEO, when using a responsive design approach for mobile web sites.
The question posed to him was:

Is there an SEO disadvantage to using responsive design instead of separate mobile URLs?

The answer is no, in fact, there is no duplication of efforts when it comes to linking and PageRank, which does have a benefit when compared to using separate mobile URLs.