“The guys at Chitika have put together some quite interesting numbers, like the fact that more than 65% of all Mobile Web traffic in the U.S. and Canada is currently coming from iOS devices.”
As with other similar studies, this one does not separate iPhone from iPad. And other studies have shown several times that iPhone web traffic is approximately on par with Android.
My guess is that once (or if) Android Tablet Sales picks up pace the balance between the platforms will be much more even.
Read: 65% Of Mobile Web Traffic comes from iOS devices (mobileorchard.com)