I've set it to 0 and it's been working great for me. But I did flash my N9 completely including the eMMC. It works amazing now. FRESH.

I don't know if setting to 0 did this but my N9's battery performance is now superb! Bluetooth stuttering for me at least has been eliminated so far.

I did an hour and a half drive with bluetooth streaming yesterday and I did not hear any stuttering or quality degradation. I would agree with P@t to make sure you're connected to GPRS before you stream and you should be fine.