I'm not going to take a position on whether DAB is worth it, however: > ...the lag associated with changing channels... It seems like this is mostly the fault

I'm not going to take a position on whether DAB is worth it, however: > ...the lag associated with changing channels... It seems like this is mostly the fault of the receiver, to me it doesn't seem like there's any reason that the receiver can't just have several filters (tuned to adjacent or saved channels) and demodulators running, so that you can tune instantly to them. I think the bigger problem with DAB, to my eyes, is codec selection and graceful degradation.