I have an 02 4.6is, with nav/dsp, and also in the SF bay area. Same issue, although it only happens with certain stations, not all. Very annoying, as a station surfer. Did not realize that it was associated with RDS.

I just purchased the vehicle, CPO, and the radio unit has already been replaced. Funny thing is, after replacement, the "ST" light no longer appears on the screen for stereo radio reception, and the "PTY" option is no longer available in the info screen.

I actually have a scheduled appointment with the dealer tomorrow to review exactly this issue. I'll post if it's been resolved.

I had RDS on my Audi, but I never experienced any delay with the same stations.