Apple itself has announced that iPads are in over 60% of the Fortune 500 companies one way or another. I personally know that iPads are in use one way or another in almost every major bank in the US, if not the world. I don't work for Apple, though I will admit to having worked for one of their manufacturing suppliers years ago. I know what kind of thought goes into their products and I can fully believe that Professionals have realized the benefit a tablet can bring to the enterprise.