Fair enough, it's certainly possible that the stat is no longer true. Unless they've talked about it recently, it's hard to know for sure. Here's an article from May of 2015 that says that 75% of Google's mobile search revenue comes from iOS, which probably hasn't changed too dramatically since then, but it may no longer be accurate: http://appleinsider.com/articles/15/05/27/apples-ios-drives-...
It is funny, but it was the first result my search gave me. The result after was from another site that reported the same figure though, so it's not like AppleInsider was alone.