Does Spotify stream at a lower bitrate when it is on 3G? Back when the highest available was 160kbps I didn't care, but now that it can go up to 320kbps it'd be nice if we could select a lower bitrate when on 3G. I'd like to listen to the higher quality when I'm around wifi but not waste my limited 3G data on it. And it'd be nice to not have to change the quality switch constantly if it doesn't already do this. Thanks.