The data shows that the Apple iPad Air made up .73% of total iPads in use by the second day of its availability. At the same point in its life, the fouth-gen iPad made up .14% of the iPad universe while the iPad mini comprised .21% of the total number of iPads in use. The new iPad still has a long way to go to become the most widely used version of Apple's tablet. That honor still belongs to the graybeard called the Apple iPad 2 which still leads the way with a 38.6% share of active iPad models.
Other data from Fiksu shows that iOS 7 is now on 72% of Apple's iDevices with iOS 6 on 24.1%. In addition, the Apple iPhone 5 still leads the way with a greater than 38% share of iPhones in use today. And the numbers show that 4.7% of iPhone users are brandishing an Apple iPhone 5s while 1.7% have the Apple iPhone 5c in their hands.
source: Fiksu via RedmondPie