In the end, I was right, but they bought a bunch of useless Blackberries anyway. It took a long time to snap them out of that Blackberry trance in the enterprise environment.
I also remember the IT guy saying that they had invested too much in a dedicated Blackberry server, to which I laughed and said, "It doesn't matter. The market is going in a completely different direction." It is maddening sometimes how large organizations become fixated on where they have been, rather on where they should be going. It's a little like saying, "We can't get those newfangled horseless carriages, because we've invested too much in wagons and buggy whips."
Apple’s security model is such that I wouldn’t allow another mobile device (i.e. no Android). But would still want some sort of enterprise mobile device management.