The speed of loading mobile websites on devices currently doesn’t impact mobile rankings. But Google will be updating the page speed ranking to specifically look at page loading speed. Google has released a page analysis tool for users to test their website and suggestions on what to fix.
Make sure your website is mobile friendly. This doesn’t necessarily mean having a ‘mobi’ site but that your web page has a responsive design meaning that it auto adjusts to the screen size viewed. Having optimised images and browser caching is important for speed. Utilising a CDN (content delivery network) helps users see your content in the quickest time possible.