Google has one again encouraged webmasters to use Instant Pages so that their load time is lessened and users have a better experience with their site. Google had rolled out Instant Pages last year as a “new feature to help users get to their desired search results even faster–in some cases even instantly! The Instant Pages feature is enabled by pretendering technology that we are building into Chrome and then is intelligently triggered by web search when we're very confident about which result is the best answer for the user's search.”
Better site load time is appreciated by Google and sites which offer a better user experience are ranked better. Google’s Matt Cutts posted a video about this and said that approximately 1 out of 100 searches are impacted by the site speed ranking factor. He said “that it would actually change the ranking to a noticeable degree.”
Coming back to Instant Pages, Google says, it is no big effort to make a site work correctly with prerendering. The traffic will be measured in Webmaster Tools as before and only results the user visits will be counted. Google has also recommended the Page Visibility API for webmasters with sites that keep track of pageviews. The API allows webmasters to know when prerendering is happening and they can keep those out of their statistics.
For more insights into lessening your site’s load time, learn about Google Page Speed Online Tool.Google Advises Webmasters to Use Instant Pages to Increase Site Load Speed!,