I was finally able to reproduce the crash on my iPad Air wifi model. Mine crashed three times.
The good news
The crash was limited to two apps - the iTunes app and the Safari app. I was multi-tasking so its possible the iTunes app crashed Safari or Safari crashed iTunes. I never had a crash with other browser apps. So, when Safari crashed I just opened the same webpage in Mercury or Opera mini (free apps) and continued reading. It worked.
I can't reproduce the crash without following the instructions in this thread - landscape in iTunes (United Kingdom), loading iTunes homepage (others, Italy?) and/or using Safari.
Everything else works. I'd say over 99% of my iPad Air works normally. Nothing else is an issue.
The technical news
The crash is minimal. It doesn't lose data, cause system-wide instability, force a re-install of an app or O/S, or compromise any other app. When the crash happened for me, the app closed, I saw an Apple logo in the center of my screen, and five seconds later I saw my home page. I loaded Safari again, all my open six tabs were still there, and nothing was lost. All the addresses in my tabs were intact. I've seen major crashes and blue screens on Microsoft terminals - *that* is a major crash.
I crashed on a website with only simple text - no video, sound or animations.
This is premature to say, but I haven't been able to crash using other browsers than Safari. Maybe it will. If it does, I'll let you know.
The crash has been a soft reset.
iTunes loading times
iTunes has been miserably slow. I have to wait ten minutes before it loads the home page. Sometimes it crashes, and then I click on the iTunes app again and it loads normally - even in landscape. The slow loading could be my wifi, traffic at peak hours, or a buggy and memory hogging app/website.
Refund or a keeper?
If something else goes wrong, I would contact Apple for a refund or replacement or some software update.
My theory is a software update from Apple will solve this problem. iOS or app update. It looks really good. SteveCDA is probably providing the best diagnostic info. to Apple, so it's only a matter of time.
Battery Life
Unbelieveable battery life. I was online for over forty-five minutes and only used 5% of my battery. The ten to thirteen hours of use without a charge looks realistic.