Contrary to the article it looks like Google is doing something different to iOS 6 users, not Apple. (note I have no idea if this is something specific to iOS users, it could be happening on Android as well - I'm not trying to attribute this to malice)
EDIT: Just tried this on my nexus 7 and it also skips the http referer page, so I get the "no referer" message. it seems like something they do for mobile browsers?