We don't see many rods any more in my area but the rules here are 2 - 10 foot rods 3 meters apart. There is so much rock and hardpan clay that ground plates are the rule except for a counterpoise ground for a HV service.
We dropped the resistance requirement from our code a long time ago.
Given the role a Ground wire serves I think it is mostly all overkill. It is rare that high voltages including lightning ever get on the low voltage wires, the neutral is the real fault current path to the source anyway.
