How long does it typically take for a dependent to be approved on a DTV visa for children under 20?

Experiences shared indicate that the approval time for dependents on a DTV visa varies by location. Reports mention timeframes ranging from 1 day in Hanoi, 2 business days in Mexico City, to 1 month at the U.S. Embassy in Washington. Generally, the approval process can take anywhere from 2 to 7 working days depending on the local embassy or consulate.