Back in 2010, Google said site speed is a ranking factor. Google’s Matt Cutts said expect something similar to come to mobile search soon.
This morning, Google announced demotion factors for mobile sites, but they did not announce site speed as one of those demotion factors. That is because that feature is not yet live but it is coming soon, and Matt wants webmasters and SEOs to prepare.
Matt mentioned a tool at Google I/O to monitor the speed of mobile websites. Outlier sites that load really slowly will see a demotion of the search results. I assume mobile sites have to be even faster than the outlier for the deskop outlier speed number.
For more of our coverage on Matt’s talk at SMX Advanced see Google’s Cutts Talks Structured Data Beta, Mobile Site Speed Need, Penalty Notices To Get Example Links & More.