The "three lines to represent a menu" metaphor has existed for years now. It just hasn't been as widely used until probably in the last year or so. I wouldn't use it to assume that iOS apps are being designed from Android apps or vice versa. You're just making baseless extrapolations.
I can't say it is baseless extrapolations. If you are hesitant to associate hamburger menu's to Android, the whole idea of iPhone revolutionizing mobile industry would be baseless extrapolations. Everything is built up on shoulders of its predecessors. Hamburger menu and side drawer have become an Android design standard at this point of time and there is no harm in saying that most iPhone apps will look like redesign of Android apps.
