Tested this a while back and changing the setting didnt seem to increase the quality in the car.
Interesting. I thought I heard a difference after I changed the settings from my desktop but it was probably the placebo effect.
Also, I note the title of this thread is: "Spotify for the US coming end of Summer" then it has a link to this as the source:
Spotify in the US | Tesla Motors
Which reads:
"For those interested, It
appears that Tesla is entering a band width test phase with Spotify for the US. They point to a late summer roll out to replace Slacker.
This info comes from a very reliable source inside Spotify Product Development Team."
Assuming the OP at the Tesla Motors forum has correct information from the very reliable source (which is a big assumption to make) it is qualified with the word "appears".
I think the word "rumour" (or "rumor" for you US folks) or maybe "speculation" (since we both spell it the same way) should be added to the title of this thread.