Telemetry rates

In mission planner, if you go to the config/tuning tab and then to the subsection called Planner, you’l see a row called Telemetry rates. Mine looks like this;

Telemetry Rates attitude: 6 Position: 2 Mode/Status: 2 RC: 2 Sensor: 1

I assume these values are priortizing processing tasks. Are they? What are good values to have as default?