Google applications that make up the backbone of Android, regardless of OS version, are updated constantly. Changes like this take iOS a year or longer to implement, because it requires a complete OS update.
In the last month, I have seen over 15 updates to key Google Apps get updated. I have seen one iOS app get updated in that time. This is what I was referring to.
Ok I get you now. You are right. The core google apps get updated so much I can't keep up.