I do not know for sure, but I hear that all this update does is add more advertising functionality. So apparently nothing was changed besides the ads are better haha. Stupid.
you get ads regardless if you update or not. they are fairly rare though. i had one or two this morning before i updated.
i dunno, i think people are overreacting about the ads. i just listened to like 10 songs after the update and didn't get a single ad...
Honestly, I paid for the yearly subscription and it was well worth it. Better than satellite radio IMO. I control the content moreso.