I got this from Sirius today, the only reason I have a stiletto is so I can listen to my NFL team audio while watching in a sports bar. it's delayed about 15 seconds, but if you stream from WiFi it's about a 10 minute delay.

Our records show that you may be listening to SiriusXM using a Sirius Stiletto. On September 30 we are improving the way we stream the SiriusXM Internet Radio service. The Stiletto is not capable of streaming the new enhanced service. To ensure you don't have any interruption in listening, we recommend you download the new mobile app that will let you to listen to SiriusXM on your smartphone, tablet, PC or current internet-connected sound system.