For automated stations it should happen (nearly) instantly. Most "nicer" radios have RDS[1] built into them and high latency would be confusing to users, so upd

For automated stations it should happen (nearly) instantly. Most "nicer" radios have RDS[1] built into them and high latency would be confusing to users, so updating it quickly is part of having a nice listener experience. [1]: https://en.wikipedia.org/wiki/Radio_Data_System https://en.wikipedia.org/wiki/Radio_Data_System