It was a long time ago, but I remember it being totally routine, no queues and no uncertainty. She should go to her school's immigration office, I'm sure they'll be able to walk her through the application and explain any other options while they're at it.
One of my summer internships was delayed for two months because USCIS thought my photo was overexposed (it wasn't)... so I definitely wouldn't say "no uncertainty" but all the paperwork was possible to complete without representation.
