My understanding is that delivery and read receipts are features that BBM users are loath to give up. Could iMessage simply be a way to siphon off more RIM use

My understanding is that delivery and read receipts are features that BBM users are loath to give up. Could iMessage simply be a way to siphon off more RIM users? Enterprise IT departments might be more easily swayed to support IOS and abandon RIM with iMessage in place.