It seems like on my network, all my iPad devices run at half the speed of the other devices.
So I tested it. I've got an airport extreme (1TB) 802.11n, and four devices plus a macbook and they are all connecting to the 5GHZ address, and tied to a 100MB Comcast Cable connection. I reset the network in settings on all the devices (to start from a common baseline) and ran Ookla speed tests on them one at a time. The results verified my impression:
iPad 2 - 40MB Down / 6MB Up iPad Air - 37MB Down / 6MB Up iPhone 6 - 89MB Down / 6MB Up iPhone 5c - 84MB Down / 6MB Up Macbook Air - 89MB Down / 6MB Up
The configurations are the same for all devices, all connecting to the 5GHZ network (I turned off the slower 2.4Ghz network for this test) but no matter how many times I run the test, both of the iPads perform slower. And it's more than just a speed loss, there is a genuine impression that they access the internet less reliably and slower than the iPhones or laptop.
Does anyone know why this is? Or better yet, a workaround?