[dpitkin]

Except I don't think BBM ever made text messages look like BBM messages. Does iMessage show you a "read" mark like bbm or what's app?

I would agree that any device only messaging system (BBM/iMessage) are probably things to stay away from if you value an easy future choice without telling everyone to stop using the old method.

[zxoq]

Read marks are an option for the receiver, and is turned off by default.