Surveys and wishful thinking do not equal units sold.
And all your links are for tablets.
Apple has never been business-friendly...EVER! Maybe, just maybe, Tim Cook will figure out that there's a whole nutha billion users out there in businessland that could use Apple products. But I really think that ship sailed a long time ago.
iOS devices all come with the Apple baggage...iTunes, Apple approved apps, Apple hardware, Apple OS, Apple Support, Apple pricing...all Apple lock-in. Although this may be fine with consumers, it is NOT fine with businesses. Not sure if you ever worked in IT but IT does not like lock-in...and there will not be an IT Revelation that lock-in is now the defacto standard or cool or hip.
iOS devices appearing in businesses are definitely not IT sanctioned/approved. There have been numerous reports/studies regarding this. We all know that the iPhone is simply a computer with the ability to make phone calls. Every company on the planet forbid you bringing in your own, personal computer and connecting to the corporate network...the iPhone is no different. IT may be tolerating it right now, but IT is definitely wary of the iPhone/iPad's security.