In a Google hangout video, at 18 minutes and 50 seconds in, Google’s John Mueller answered a question around which desktop signals are used for mobile ranking as well.

John said that many are, including the page speed of your desktop web site, the rel canonical signal and many other signals are used for your mobile ranking. John said this may change over time as Google obtains more mobile signals through their crawling but for now, the page speed of your desktop site actually plays more importance than the page speed of your mobile site, when it comes to your mobile ranking.

Here is the video:

Question:

Answer:

Forum discussion at Google+.