This appears to be a mobile browser thing when searching google with https.
Search https://www.google.com in a desktop browser and you will get a results page where the links don't like you directly to the result page, they actually take you to an http redirect page which then forwards you to your final destination (which now gets a "google.com" referer.
On my iPhone and my Nexus 7 if I do a search on https://www.google.com the results page does not have the http redirect link. So the final destination does not get a referer.
This seems to be a behavior on Google's side that is different for desktop and mobile browsers, there's nothing specific to Apple here.
Search https://www.google.com in a desktop browser and you will get a results page where the links don't like you directly to the result page, they actually take you to an http redirect page which then forwards you to your final destination (which now gets a "google.com" referer.
On my iPhone and my Nexus 7 if I do a search on https://www.google.com the results page does not have the http redirect link. So the final destination does not get a referer.
This seems to be a behavior on Google's side that is different for desktop and mobile browsers, there's nothing specific to Apple here.