看了CIBT的web下面一段，打电话问，Citizens Born Outside of the US说会较长时间。

Citizens Born Outside of the US
The visa requests of US citizens who were born outside of the US must go through an approval process at the Consulate of India. This process may take up to 20 business days or more depending on the country of birth. All rules and decisions over the process is at the discretion of the Indian government