Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I got the update earlier today on my iPad Air 2 which was already running the GM version.
13A344 is the version it's now showing after the update. Checked the iPhone 6 Plus which was also on GM version and nothing. I searched the web for others getting the update from GM version, didn't see any results so I checked Twitter and same result, until I checked the forums here.

My iPad mini GM iOS 9 is still the same as well with no updates.
 
I got the update earlier today on my iPad Air 2 which was already running the GM version.
13A344 is the version it's now showing after the update. Checked the iPhone 6 Plus which was also on GM version and nothing. I searched the web for others getting the update from GM version, didn't see any results so I checked Twitter and same result, until I checked the forums here.

My iPad mini GM iOS 9 is still the same as well with no updates.
So what version is on the devices that aren't showing the update?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.