As Dr. Evil would say...
2300 people. Well there is a representative view. Plus, it is a report delivered by a company that provides iPhone integration (and from what I can see on their web site ONLY iPhone integration) to businesses. No bias there.
In my company there are:
7 Android (5 of which are used by IT staff)
2 iPhones (For VP's who use them for email only and we forward their company email to their Apple mailboxes.)
The trend I see is people dropping Blackberry for Androids. we have more phones than that in the building. I only detailed those used in the company business. If you include all personal phones in use as well the ratio is about 4:2:1 for BB - Android - iPhone currently.