When I see a post like this I usually check it against the Google Analytics accounts I have.
What I'm seeing today for the first 1/2 of January is:
Windoz 31.6%
iOS 28.5%
Android 24.68%
MacOS 11.16%
Linux 1.6%
iOS 9.x 71.6%
iOS 8.x 19.6%
iOS <8 8.8%
Android 5.x 51.3%
Android 4.x 45.2%
Android <4 3.44%
I'm therefore skeptical of the 75% claim by Apple for 9.x especially since my 8.x stats are an exact match.
Could be that Apple isn't counting anything < iOS7.
I'm seeing a range of iOS as low as v3.2.2
Android seems a lot less fragmented these days than it did in the past.
That was one of my excuses for not porting my iOS Apps to Android.
Need to stop using it.
Those figures will be skewed somewhat by the tracking blockers in Firefox and others.
Shouldn't affect the iOS numbers though.
Or maybe you just see a small biased part of the world (proper sampling is key) and your stats are bunk.
Think about that one.
Android's stats are way way worse than that; funny how you didn't question those hey?
Most people by far are still on Android 4, that's a fact.
Why? Because their phones can't update.