Thanks a lot for the answer.
We are thinking about doing one of the two things:
1. use I-824 to convert it to consular process.
2. hire a lawyer to go with my parents for the interview if we continue the I-485 route and an interview is called.
We would great appriciate it if you can comment on these 2 approahes.
More info:
I130 and I485 concurrent filing
parents arrived on 4/4/2013
form signed on 4/24/2013
mailed on 5/13/2013
INS received on 5/17/2013
Thanks,