Curious if anyone has noticed this behavior (I'm not on dev preview, or I'd check it myself

)
1. Get in car, connect iPhone to bluetooth car stereo
2. Receive incoming text message
Does the phone either:
1. Announce over the car stereo that you have a new message and if you want to read it then reply and all that (all Siri powered)
2. Simply ding and go silent.
Really, REALLY want #1 to work. My Windows Phone has this feature and it's indispensable. So if someone could check that for me, that'd be great! Thanks.