Voice Memo CAN record and play through car's bluetooth microphone/speakers

I have Lexus LS460 and I was able to test this morning.

The new Voice Memos can record via the cars microphone and playback through the cars speakers. There is button on the top left of the Voice Memos screen (the screen where you play back a memo) where you can choose iphone, speaker or handsfree.

I tried this out after I found out that the Voice Messages now playback through the car's speakers. Previously the best I could do is play through the iPhone's speaker even though the iPhone was hooked to the car through the dock connector so I could listen to iPod music, podcasts, audiobooks.

Since the ipod function has no choice to decide where you want to listen it does not seem you can pipe the sound via bluetooth for music.