jpadc, thanks for the info.
Re Bluetooth website: It doesn't sound like you actually entered a vehicle/phone combo. If you do so, and hit 'search', I think you'll see what we mean. The compatibility page that comes up doesn't just imply audio streaming, it says it explicitly. It lists compatibility for two features ('Wireless Audio Streaming' and 'Audio Playback Control'), and the tooltips for these features further clarify that they refer to wireless music streaming from your device via bluetooth.
Re the owners manual: I agree that it is weird how the 'FM-AM-SAT Radio...' subsection within the 'Audio Systems (models without Navigation System)' section also has the 'models without navigation system' parentheses. However, other subsections in this section that don't have the parentheses (USB, iPod, steering wheel controls, antenna,...) are in the S model - which means that the parentheses definitely aren't being used to specify which features are/are not in models without Nav systems. In fact, unless I'm missing something, it looks like every single feature in this section is on the S except for BT Audio.
1. I think it is important to note that Nissan doesn't mention streaming audio for any model when you compare specs on their website (http://www.nissanusa.com/electric-cars/leaf/versions-specs/). They mention Handsfree Bluetooth Phone for the 'S' and then each other trim says it has everything the one before it has. This strongly implies that they all have the same Bluetooth functionality.
2. This is 2015, not 2005. Good luck finding a BT device that doesn't support A2DP - it has become standard. So when you plaster a big fat 'Bluetooth' logo directly above a stereo system (like in the 2015 S model), I think anyone could be excused for interpreting that as the stereo system supporting BT audio (i.e. A2DP). Who would look at it and think "oh, that probably refers to the buttons way over here on the steering wheel, where there isn't a BT logo, not to the stereo"?
Sorry to be so rant-y, but I'm really frustrated by this (and with Nissan support that would rather insult and hang up on me than talk about these discrepancies). If anyone else is concerned by this, please speak up!