We had no turno for the DNI, wasn't needed. We actually asked when we were there doing the initial birth certs if we needed to make an appt for their passports/DNI and they told us wasn't necessary and just to do it when we came back in a few days to pick up their BCs. We did and were in and out in under an hour. They couldn't have been nicer.
It took much longer (and a lot more expensive!) at the US Embassy but to be fair, there I had to do the interview to prove I lived in the US + I had forgotten their passport photos so had to leave and get their pics taken and then go back again. But def more expensive!
yep you see that's the thing