I have an iPad Air 128gb (not the 2) which I purchased from Verizon approximatley 09/12/2014. I immediately had freezing problems and two other issues.
As of October 31, 2014 Apple would not acknowledged the freezing issue of iOS 8.1, in fact when I asked the highest level of Apple tech support if they've had issues of freezing they flat out said no.
The first and most concerning issue is while typing a document, email, or filling out a web page my iPad would lock up. I had to reboot and lose my work and start over while crossing my fingers that I could complete the document prior to my iPad freezing again, crossing my fingers didn't help.
The second issue I was having is downloading Apple Numbers, Apple Keynote and the rest of Apple iWorks. I would assume that if anything would download from the app store it would be Apple programs. These were the only programs I couldn't download.
The third issue was with the slow speed and crashing of Safari. I installed Chrome which seems to have resolved the Safari issue. I was no longer use Safari unless I'm forced to.
After wasting approximately 4 hours on the phone with Verizon tech support and the highest level of Apple tech support troubleshooting the freezing issue, reset this, uninstall that, reset the entire system reinstall and even reset my WiF which was working fine on my laptop, I was told to take my iPad Air to an Apple store for a replacement. While at the store I reinstalled everything from my backup on iCloud. I also was able to download the Apple programs from the app store. I'm sorry I didn't stay at the store to check if the freezing issue was resolved. It still freezes under the same circumstances. I now have a $900 electronic solitaire game.
I wouldn't be as fed up with Apple if they would just tell me their is a problem and they're working on an update to fix it.
Apple, Never again... and I almost ordered an iPhone 6 Plus.