Ill throw in my experiences I have had thus far.
I have the Pioneer Avh-2400bt.
First off.. iPhone 4s on 5.1.1 worked perfectly.
Upgraded the iPhone 4s to 6.0. Like most lost the Play,Pause,Etc.. via Bluetooth. Also there was no tag info on the screen, just a "No Data Provided" on the screen..Phone still made calls though. Using the Pioneer cable(usb/aux) I could still control the phone including all playlists and videos and even app mode. Pandora worked as well.
Not a big deal but the having to plug in the phone kina ***** 😟
So now the iPhone 5 running 6.0.. Bluetooth streaming is fine and so are phone calls but still getting a "No Data Provided" on the head unit. I can also stream Pandora and Sirius via Bluetooth but cannot control play,pause,skip track and there are no tags on the head unit.
So for fun I tried out the lightning connector that goes with the iPhone 5. It plugs into my USB Drive in my head unit.. I can control all music features, playlists, shuffle, repeat, and even Pandora stations show all the info. It also charges the phone =)
What I tried but couldn't get to work was Videos. The option is greyed out. Its most liekly due to the fact that the video portion is controlled thru the AUX port and not the usb port. Thats what I read anyway. For the same reason as videos I cannot get APP mode to work.
For now i'll just plug in my phone when i wanna listen to music. I cant stand not having the tags showing up.
But as soon as either Pioneer or Apple release an update I will for sure go back to Bluetooth streaming =)